Weinberg Benjamin M, Oh David S, Ohning Gordon V, Pisegna Joseph R
UCLA San Fernando Valley Program, Olive View Medical Center-UCLA Medical Center, Department of Medicine, 14445 Olive View Drive, 2B-182, Sylmar, California 91342-1438, USA.
Dig Dis Sci. 2004 Apr;49(4):693-6. doi: 10.1023/b:ddas.0000026320.17006.14.