@inbook{inbookaa8092f5,
title   = {Barrett's esophagus: late results of conservative management},
author = {Pollara, Wilson Modesto and Zilberstein, Bruno and Cecconello, Ivan and Venco, F E and Parada, A A and Pinotti, H W},
year = {1987},
publisher = {Springer-Verlag},
journal   = {Diseases of the Esophagus}
}