545,444 NÄSLUND INGMAR Gastric bypass versus gastroplasty : a prospective study of differences in two surgical procedures for morbid obesity : [thesis| / by Ingmar Naslund ; from the Departments of Surgery, Örebro Medical Centre Hospital and Hu dinge Hospital, Karolinska Institute, Stockholm. - Stockholm : Kong . Carolinska Medico Chirurgiska Institutet, 1987. -60 s. : il., wykr. ; 24 cm (Acta Chirurgica Scandinavica ; Suppl. 536)