Abstract

GWAS have identified >200 risk loci for Inflammatory Bowel Disease (IBD). The majority of disease associations are known to be driven by regulatory variants. To identify the putative causative genes that are perturbed by these variants, we generate a large transcriptome data set (nine disease-relevant cell types) and identify 23,650 cis-eQTL. We show that these are determined by ∼9720 regulatory modules, of which ∼3000 operate in multiple tissues and ∼970 on multiple genes. We identify regulatory modules that drive the disease association for 63 of the 200 risk loci, and show that these are enriched in multigenic modules. Based on these analyses, we resequence 45 of the corresponding 100 candidate genes in 6600 Crohn disease (CD) cases and 5500 controls, and show with burden tests that they include likely causative genes. Our analyses indicate that ≥10-fold larger sample sizes will be required to demonstrate the causality of individual genes using this approach.

Details

Title
IBD risk loci are enriched in multigenic regulatory modules encompassing putative causative genes
Author
Momozawa, Yukihide 1 ; Dmitrieva, Julia 2 ; Théâtre, Emilie 2 ; Deffontaine, Valérie 2 ; Rahmouni, Souad 2 ; Charloteaux, Benoît 2 ; Crins, François 2 ; Docampo, Elisa 2 ; Elansary, Mahmoud 2 ; Ann-Stephan Gori 2 ; Lecut, Christelle 3 ; Mariman, Rob 2 ; Mni, Myriam 2 ; Oury, Cécile 3 ; Altukhov, Ilya 4 ; Alexeev, Dmitry 5 ; Aulchenko, Yuri 6 ; Amininejad, Leila 7 ; Bouma, Gerd 8 ; Hoentjen, Frank 9 ; Löwenberg, Mark 10 ; Oldenburg, Bas 11 ; Pierik, Marieke J 12 ; Andrea E vander Meulen-de Jong 13 ; C Janneke van der Woude 14 ; Visschedijk, Marijn C 15 ; Abraham, Clara 16 ; Jean-Paul Achkar 17 ; Ahmad, Tariq 18 ; Ananthakrishnan, Ashwin N 19 ; Andersen, Vibeke 20 ; Anderson, Carl A 21 ; Andrews, Jane M 22 ; Annese, Vito 23 ; Aumais, Guy 24 ; Baidoo, Leonard 25 ; Baldassano, Robert N 26 ; Bampton, Peter A 27 ; Barclay, Murray 28 ; Barrett, Jeffrey C 21 ; Bayless, Theodore M 29 ; Bethge, Johannes 30 ; Bitton, Alain 31 ; Boucher, Gabrielle 32 ; Brand, Stephan 33 ; Brandt, Berenice 30 ; Brant, Steven R 29 ; Carsten Büning 34 ; Chew, Angela 35 ; Cho, Judy H 36 ; Cleynen, Isabelle 37 ; Cohain, Ariella 38 ; Croft, Anthony 39 ; Daly, Mark J 40 ; Mauro D’Amato 41 ; Danese, Silvio 42 ; De Jong, Dirk 9 ; Goda Denapiene 43 ; Denson, Lee A 44 ; Devaney, Kathy L 45 ; Dewit, Olivier 46 ; Renata D’Inca 47 ; Dubinsky, Marla 48 ; Duerr, Richard H 49 ; Edwards, Cathryn 50 ; Ellinghaus, David 51 ; Essers, Jonah 52 ; Ferguson, Lynnette R 53 ; Festen, Eleonora A 15 ; Fleshner, Philip 54 ; Florin, Tim 55 ; Franke, Andre 51 ; Fransen, Karin 56 ; Gearry, Richard 57 ; Gieger, Christian 58 ; Jürgen Glas 59 ; Goyette, Philippe 32 ; Green, Todd 60 ; Griffiths, Anne M 61 ; Guthery, Stephen L 62 ; Hakonarson, Hakon 63 ; Halfvarson, Jonas 63 ; Hanigan, Katherine 39 ; Haritunians, Talin 54 ; Hart, Ailsa 64 ; Hawkey, Chris 65 ; Hayward, Nicholas K 66 ; Hedl, Matija 16 ; Henderson, Paul 67 ; Hu, Xinli 68 ; Huang, Hailiang 40 ; Hui, Ken Y 36 ; Imielinski, Marcin 26 ; Ippoliti, Andrew 54 ; Jonaitis, Laimas 69 ; Jostins, Luke 70 ; Karlsen, Tom H 71 ; Kennedy, Nicholas A 72 ; Mohammed Azam Khan 73 ; Kiudelis, Gediminas 69 ; Krupa Krishnaprasad 74 ; Kugathasan, Subra 75 ; Limas Kupcinskas 76 ; Latiano, Anna 77 ; Laukens, Debby 78 ; Lawrance, Ian C 79 ; Lee, James C 80 ; Lees, Charlie W 72 ; Leja, Marcis 81 ; Johan Van Limbergen 61 ; Lionetti, Paolo 82 ; Liu, Jimmy Z 21 ; Mahy, Gillian 83 ; Mansfield, John 84 ; Massey, Dunecan 80 ; Mathew, Christopher G 85 ; McGovern, Dermot P B 54 ; Milgrom, Raquel 86 ; Mitrovic, Mitja 87 ; Montgomery, Grant W 66 ; Mowat, Craig 88 ; Newman, William 73 ; Ng, Aylwin 89 ; Ng, Siew C 90 ; Sok Meng Evelyn Ng 16 ; Nikolaus, Susanna 30 ; Kaida Ning 16 ; Nöthen, Markus 91 ; Oikonomou, Ioannis 16 ; Palmieri, Orazio 77 ; Parkes, Miles 80 ; Phillips, Anne 88 ; Ponsioen, Cyriel Y 10 ; Potocnik, Urõs 92 ; Prescott, Natalie J 93 ; Proctor, Deborah D 16 ; Radford-Smith, Graham 94 ; Rahier, Jean-Francois 95 ; Raychaudhuri, Soumya 68 ; Regueiro, Miguel 25 ; Rieder, Florian 96 ; Rioux, John D 97 ; Ripke, Stephan 40 ; Roberts, Rebecca 28 ; Russell, Richard K 98 ; Sanderson, Jeremy D 99 ; Sans, Miquel 100 ; Satsangi, Jack 72 ; Schadt, Eric E 38 ; Schreiber, Stefan 101 ; Schulte, Dominik 30 ; Schumm, L Philip 102 ; Regan, Scott 25 ; Seielstad, Mark 103 ; Sharma, Yashoda 16 ; Silverberg, Mark S 86 ; Simms, Lisa A 39 ; Skieceviciene, Jurgita 69 ; Spain, Sarah L 104 ; A Hillary Steinhart 86 ; Stempak, Joanne M 86 ; Stronati, Laura 105 ; Sventoraityte, Jurgita 74 ; Targan, Stephan R 54 ; Taylor, Kirstin M 99 ; Anje ter Velde 10 ; Torkvist, Leif 106 ; Tremelling, Mark 107 ; Suzanne van Sommeren 15 ; Vasiliauskas, Eric 54 ; Verspaget, Hein W 13 ; Walters, Thomas 108 ; Wang, Kai 26 ; Wang, Ming-Hsi 109 ; Wei, Zhi 110 ; Whiteman, David 66 ; Wijmenga, Cisca 56 ; Wilson, David C 67 ; Winkelmann, Juliane 111 ; Xavier, Ramnik J 112 ; Zhang, Bin 38 ; Zhang, Clarence K 113 ; Zhang, Hu 114 ; Zhang, Wei 16 ; Zhao, Hongyu 113 ; Zhao, Zhen Z 66 ; Lathrop, Mark 115 ; Hugot, Jean-Pierre 116 ; Weersma, Rinse K 15 ; De Vos, Martine 78 ; Franchimont, Denis 7 ; Vermeire, Severine 37 ; Kubo, Michiaki 117 ; Louis, Edouard 118 ; Georges, Michel 2 

 Unit of Animal Genomics, WELBIO, GIGA-R & Faculty of Veterinary Medicine, University of Liège (B34), Liège, Belgium; Laboratory for Genotyping Development, RIKEN Center for Integrative Medical Science, Yokohama, Kanagawa, Japan 
 Unit of Animal Genomics, WELBIO, GIGA-R & Faculty of Veterinary Medicine, University of Liège (B34), Liège, Belgium 
 Laboratory of Thrombosis and Hemostasis, GIGA-R, University of Liège (B34), Liège, Belgium 
 Moscow Institute of Physics and Technology, Dolgoprudny, Russian Federation 
 Novosibirsk State University, Novosibirsk, Russian Federation 
 PolyOmica, ‘s-Hertogenbosch, The Netherlands; Institute of Cytology and Genetics SD RAS, Novosibirsk, Russia; Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Teviot Place, Edinburgh, UK 
 Gastroentérologie Médicale, Faculté de Médicine, Université Libre de Bruxelles, Anderlecht, Belgium 
 Department of Gastroenterology and Hepatology, VU University Medical Centre, Amsterdam, The Netherlands 
 Department of Gastroenterology and Hepatology, University Medical Centre St. Radboud, Nijmegen, The Netherlands 
10  Department of Gastroenterology and Hepatology, Amsterdam Medical Centre, Amsterdam, The Netherlands 
11  Department of Gastroenterology and Hepatology, University Medical Centre Utrecht, Utrecht, The Netherlands 
12  Department of Gastroenterology and Hepatology, University Medical Centre Maastricht, Maastricht, The Netherlands 
13  Department of Gastroenterology and Hepatology, Leiden University Medical Centre, Leiden, The Netherlands 
14  Department of Gastroenterology and Hepatology, Erasmus Medical Centre, Rotterdam, The Netherlands 
15  Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands 
16  Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA 
17  Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA 
18  Peninsula College of Medicine and Dentistry, Exeter, UK 
19  Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Division of Medical Sciences, Harvard Medical School, Boston, MA, USA 
20  Focused Research Unit for Molecular Diagnostic and Clinical Research (MOK), IRS-Center Sonderjylland, Hospital of Southern Jutland, Åbenrå, Denmark; Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark 
21  Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridgeshire, UK 
22  Inflammatory Bowel Disease Service, Department of Gastroenterology and Hepatology, Royal Adelaide Hospital, Adelaide, Australia 
23  Unit of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico-Casa Sollievo della Sofferenza (IRCCS-CSS) Hospital, San Giovanni Rotondo, Italy; Strutture Organizzative Dipartimentali (SOD) Gastroenterologia 2, Azienda Ospedaliero Universitaria (AOU) Careggi, Florence, Italy 
24  Facult de Médecine, Universit de Montréal, Montréal, QC, Canada; Department of Gastroenterology, Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada 
25  Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA 
26  Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA 
27  Department of Gastroenterology and Hepatology, Flinders Medical Centre and School of Medicine, Flinders University, Adelaide, Australia 
28  Department of Medicine, University of Otago, Christchurch, New Zealand 
29  Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA 
30  Department for General Internal Medicine, Christian-Albrechts-University, Kiel, Germany 
31  Division of Gastroenterology, Royal Victoria Hospital, Montréal, QC, Canada 
32  Research Center, Montreal Heart Institute, Montréal, QC, Canada 
33  Department of Medicine II, Ludwig-Maximilians-University Hospital Munich-Grosshadern, Munich, Germany 
34  Department of Gastroenterology, Campus Charité Mitte, Universitatsmedizin Berlin, Berlin, Germany 
35  Harry Perkins Institute for Medical Research, School of Medicine and Pharmacology, University of Western Australia, Murdoch, WA, Australia; IBD Unit, Fremantle Hospital, Fremantle, Australia 
36  Department of Genetics, Yale School of Medicine, New Haven, CT, USA 
37  Translational Research in Gastrointestinal Disorders, Department of Clinical and Experimental Medicine, KU Leuven, Leuven, Belgium 
38  Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, New York, NY, USA 
39  Inflammatory Bowel Diseases, Genetics and Computational Biology, Queensland Institute of Medical Research, Brisbane, Australia 
40  Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA 
41  Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastián, Spain; IKERBASQUE, Basque Foundation for Science, Bilbao, Spain 
42  IBD Center, Department of Gastroenterology, Istituto Clinico Humanitas, Milan, Italy 
43  Center of Hepatology, Gastroenterology and Dietetics, Vilnius University, Vilnius, Lithuania 
44  Pediatric Gastroenterology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA 
45  Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 
46  Department of Gastroenterology, Université Catholique de Louvain (UCL) Cliniques Universitaires Saint-Luc, Brussels, Belgium 
47  Division of Gastroenterology, University Hospital Padua, Padua, Italy 
48  Department of Pediatrics, Cedars Sinai Medical Center, Los Angeles, CA, USA 
49  Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA 
50  Department of Gastroenterology, Torbay Hospital, Torbay, Devon, UK 
51  Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany 
52  Center for Human Genetic Research, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Pediatrics, Harvard Medical School, Boston, MA, USA 
53  Faculty of Medical & Health Sciences, School of Medical Sciences, The University of Auckland, Auckland, New Zealand 
54  F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA 
55  Department of Gastroenterology, Mater Health Services, Brisbane, Australia 
56  Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands 
57  Department of Medicine, University of Otago, Christchurch, New Zealand; Department of Gastroenterology, Christchurch Hospital, Christchurch, New Zealand 
58  Institute of Genetic Epidemiology, Helmholtz Zentrum München—German Research Center for Environmental Health, Neuherberg, Germany 
59  Department of Medicine II, Ludwig-Maximilians-University Hospital Munich-Grosshadern, Munich, Germany; Department of Preventive Dentistry and Periodontology, Ludwig-Maximilians-University Hospital Munich-Grosshadern, Munich, Germany 
60  Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Human Genetic Research, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 
61  Division of Pediatric Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, Toronto, ON, Canada 
62  Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA 
63  Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden 
64  Department of Medicine, St. Mark’s Hospital, Harrow, Middlesex, UK 
65  Nottingham Digestive Diseases Centre, Queens Medical Centre, Nottingham, UK 
66  Molecular Epidemiology, Genetics and Computational Biology, Queensland Institute of Medical Research, Brisbane, Australia 
67  Paediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, UK; Child Life and Health, University of Edinburgh, Edinburgh, Scotland, UK 
68  Division of Rheumatology Immunology and Allergy, Brigham and Women’s Hospital, Boston, MA, USA 
69  Academy of Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania 
70  Wellcome Trust Centre for Human Genetics, University of Oxford, Headington, UK; Christ Church, University of Oxford, St Aldates, UK 
71  Research Institute of Internal Medicine, Department of Transplantation Medicine, Division of Cancer, Surgery and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Cancer, Surgery and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway 
72  Gastrointestinal Unit, Western General Hospital University of Edinburgh, Edinburgh, UK 
73  Genetic Medicine, Manchester Academic Health Science Centre, Manchester, UK; The Manchester Centre for Genomic Medicine, University of Manchester, Manchester, UK 
74  QIMR Berghofer Medical Research Institute, Royal Brisbane Hospital, Brisbane, Australia 
75  Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA 
76  Department of Gastroenterology, Kaunas University of Medicine, Kaunas, Lithuania 
77  Unit of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico-Casa Sollievo della Sofferenza (IRCCS-CSS) Hospital, San Giovanni Rotondo, Italy 
78  Department of Gastroenterology, University Hospital, Gent, Belgium 
79  Harry Perkins Institute for Medical Research, School of Medicine and Pharmacology, University of Western Australia, Murdoch, WA, Australia; Centre for Inflammatory Bowel Diseases, Saint John of God Hospital, Subiaco, WA, Australia 
80  Inflammatory Bowel Disease Research Group, Addenbrooke’s Hospital, Cambridge, UK 
81  Faculty of medicine, University of Latvia, Riga, Latvia 
82  Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Universitê di Firenze Strutture Organizzative Dipartimentali (SOD) Gastroenterologia e Nutrizione Ospedale Pediatrico Meyer, Firenze, Italy 
83  Department of Gastroenterology, The Townsville Hospital, Townsville, Australia 
84  Institute of Human Genetics, Newcastle University, Newcastle upon Tyne, UK 
85  Department of Medical and Molecular Genetics, King’s College London, London, UK; Sydney Brenner Institute for Molecular Bioscience, University of the Witwatersrand, Johannesburg, South Africa 
86  Inflammatory Bowel Disease Centre, Mount Sinai Hospital, Toronto, ON, Canada 
87  Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands; Center for Human Molecular Genetics and Pharmacogenomics, Faculty of Medicine, University of Maribor, Maribor, Slovenia 
88  Department of Medicine, Ninewells Hospital and Medical School, Dundee, UK 
89  Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 
90  Department of Medicine and Therapeutics, Institute of Digestive Disease, Chinese University of Hong Kong, Hong Kong, Hong Kong 
91  Department of Genomics Life & Brain Center, University Hospital Bonn, Bonn, Germany 
92  Center for Human Molecular Genetics and Pharmacogenomics, Faculty of Medicine, University of Maribor, Maribor, Slovenia; Faculty for Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia 
93  Department of Medical and Molecular Genetics, King’s College London, London, UK 
94  Inflammatory Bowel Diseases, Genetics and Computational Biology, Queensland Institute of Medical Research, Brisbane, Australia; Department of Gastroenterology, Royal Brisbane and Womens Hospital, Brisbane, Australia 
95  Department of Gastroenterology, Université Catholique de Louvain (UCL) Centre Hospitalier Universitaire (CHU) Mont-Godinne, Mont-Godinne, Belgium 
96  Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, OH, USA 
97  Facult de Médecine, Universit de Montréal, Montréal, QC, Canada; Research Center, Montreal Heart Institute, Montréal, QC, Canada 
98  Paediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, UK 
99  Department of Gastroenterology, Guy’s & St. Thomas’ NHS Foundation Trust, St.-Thomas Hospital, London, UK 
100  Department of Digestive Diseases, Hospital Quiron Teknon, Barcelona, Spain 
101  Department for General Internal Medicine, Christian-Albrechts-University, Kiel, Germany; Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany 
102  Department of Public Health Sciences, University of Chicago, Chicago, IL, USA 
103  Human Genetics, Genome Institute of Singapore, Singapore, Singapore; Institute for Human Genetics, University of California, San Francisco, CA, USA 
104  Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridgeshire, UK; Open Targets, Wellcome Trust Genome Campus, Hinxton, Cambridgeshire, UK 
105  Department of Biology of Radiations and Human Health, Agenzia Nazionale per le Nuove Tecnologie l’energia e lo Sviluppo Economico Sostenibile (ENEA), Rome, Italy 
106  Department of Clinical Science Intervention and Technology, Karolinska Institutet, Stockholm, Sweden 
107  Gastroenterology & General Medicine, Norfolk and Norwich University Hospital, Norwich, UK 
108  Division of Pediatric Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, Toronto, ON, Canada; Faculty of Medicine, University of Toronto, Toronto, ON, Canada 
109  Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, OH, USA; Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA 
110  Department of Computer Science, New Jersey Institute of Technology, Newark, NJ, USA 
111  Institute of Human Genetics, Technische Universität München, Munich, Germany; Department of Neurology, Technische Universität München, Munich, Germany 
112  Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA 
113  Department of Biostatistics, School of Public Health, Yale University, New Haven, CT, USA 
114  Department of Gastroenterology, West China Hospital, Chengdu, Sichuan, China; State Key Laboratory of Biotherapy, Sichuan University West China University of Medical Sciences (WCUMS), Chengdu, Sichuan, China 
115  McGill University Centre for Molecular and Computational Genomics, Montreal, QC, Canada 
116  UMR 1149 INSERM/Université Paris-Diderot Sorbonne Paris-Cité, Assistance Publique Hôpitaux de Paris, Paris, France 
117  Laboratory for Genotyping Development, RIKEN Center for Integrative Medical Science, Yokohama, Kanagawa, Japan 
118  CHU-Liège and Unit of Gastroenterology, GIGA-R & Faculty of Medicine, University of Liège, Liège, Belgium 
Pages
1-18
Publication year
2018
Publication date
Jun 2018
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2058239460
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.