61.   This study lends further support to the theory that bile acids may play a role in the development of polyps and colorectal cancer.

62.   Decreased amounts of EGF are found in the mucosa of the inflamed oesophagus, indicating that EGF may also play a role in the development or healing of oesophagitis.

63.   This suggests that other reservoirs of H pylori infection also play a role in its epidemiology within a family setting.

64.   Anthranoid-containing laxatives -- aloe, cascara, frangula, and rhubarb -- may play a role in colerectal cancer.

65.   The acid microenvironment also plays a role in intestinal absorption of folic acid and oligopeptides.

66.   The aim of this study was to examine whether endogenous eicosanoids play a role in controlling cyclosporin A induced toxicity.

67.   Several distinct pathogenetic mechanisms are currently considered to play a role in the hepatotoxicity of alcohol, with investigators disagreeing as to their relative importance.

68.   Cumulative alcohol intake certainly plays a role and other environmental factors, in particular nutrition, may also be important.

69.   These findings suggest that postprandial increases in bile salt concentrations in the terminal ileum may play a role in the inhibition of ileal motility.

70.   It would seem that the attack at Petit-Clamart did play a role, if only to banish lingering reservations.