344. What is the proportion of dyskinesia related to esophagitis ?
N. Boige, F. Viarme, G. Cargill, J. Navarro (Paris)

345. What is the role of achalasia in infancy ?
A. Appignani, E. Paico, M. Lima, M. Ferrari, R. Domini (Bologna)

346. Partial achalasia and gastroesophageal reflux : a disorder of maturation ?
S.G. Jolley, A.S. Besser(Las Vegas)