Fix Oren K, Simon Jonathan T, Farraye Francis A, Oviedo Jaime A, Pratt Daniel S, Chen William T, Cave David R
Section of Gastroenterology, Boston University Medical Center, Boston, MA, and Division of Gastroenterology, Rhode Island Hospital, Providence, USA.
Dig Dis Sci. 2006 Jul;51(7):1169-74. doi: 10.1007/s10620-006-8027-6.