- Gastric carcinogenesis in the rat induced by duodenogastric reflux without carcinogens: morphology, mucin histochemistry, polyamine metabolism, and labelling index. Taylor, P.R., Mason, R.C., Filipe, M.I., Vaja, S., Hanley, D.C., Murphy, G.M., Dowling, R.H., McColl, I. Gut (1991)