220. Is the incidence of complications of CLE significantly higher in cases of alkaline reflux than in cases of acid reflux?
RA. Hinder (Omaha)

221. What are the characteristic features of stricture in Barrett's mucosa?
K. Moghissi (Hull)

222. What is termed a Savary's ulcer? How does the evolution of a typical Barrett's ulcer differ from that of a Savary's ulcer?
E. Brossard, J.B. Ollyo, C. Fontolliet, M. Savary, Ph. Monnier (Lausanne)

223. Is Helicobacter pylori involved in the pathogenesis of the Barrett type ulcer?
E. Brassard (Lausanne)