Digestive Diseases and Sciences
Digestive Diseases and Sciences > 1998 > 43 > 1 > 170-177
Digestive Diseases and Sciences > 1998 > 43 > 1 > 188-192
Digestive Diseases and Sciences > 1998 > 43 > 1 > 170-177
Digestive Diseases and Sciences > 1998 > 43 > 1 > 188-192