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Abstract
Patients date Age (y) 55.3 (34-78) Height (cm) 157.6 (147-168) Weight (kg) 58.1 (38.5-80) Neck circumference (cm) 37.3 (29-52) Thyromental distance (cm) 5.5 (4.5-7) ASA class (I/II/III) 10/10 Mallampati class (I/II/III) 10/9/1 Table 1 The characteristics of the patients: all patients were female.