Zivny Jaroslav, Banner Barbara F, Agrawal Sanjay, Pihan German, Barnard Graham F
Department of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA.
Dig Dis Sci. 2004 Apr;49(4):551-5. doi: 10.1023/b:ddas.0000026297.25591.62.