Kulkarni A, Ravi T J, Brodmerkel G J, Agrawal R M
Division of Gastroenterology, Allegheny General Hospital, Allegheny University of the Health Sciences, Pittsburgh, Pennsylvania 15212, USA.
Dig Dis Sci. 1997 Jun;42(6):1142-5. doi: 10.1023/a:1018825301263.