Assessment of gastric emptying using a low fat meal: establishment of international control values. - Tougas,G.; Eaker,E.Y.; Abell,T.L.; Abrahamsson,H.; Boivin,M.; Chen,J.; Hocking,M.P.; Quigley,E.M.; Koch,K.L.; Tokayer,A.Z.; Stanghellini,V.; Chen,Y.; et al. (Am J Gastroenterol, 2000)