The editors are retracting the following paper and abstract: Fogel RB, Malhotra A, Dalagiorgou G, Robinson MK, Jakab M, Kikinis R, Pittman SD, White DP. Anatomic and physiologic predictors of apnea severity in morbidly obese subjects. Sleep 2003;26(2):150-155 and Fogel RB, Malhotra A, Pillar G, Dalagiorgou G, Pittman S, Jakab M, Robinson M, White DP. The effect of surgically induced weight loss on sleep disordered breathing and pharyngeal anatomy. Sleep (Abstract Supplement) 2001;24:A7.