A study comparing tolerability, satisfaction and acceptance of three different techniques for esophageal endoscopy: sedated conventional, unsedated peroral ultra thin, and esophageal capsule - Nakos, G; Karagiannis, S.; Ballas, S; Galanis, P; Alevizopoulos, G; Nakos, A; Mavrogiannis, C (Diseases of the Esophagus, 2009)