1. Risk factors in toxic megacolon

   • R. Caprilli
   • P. Vernia
   • G. Frieri

   Original Articles Pages: 817 - 822

2. Effect of corticosteroids on indomethacin-induced intestinal ulceration in the rat

   • M. J. Derelanko
   • J. F. Long

   Original Articles Pages: 823 - 829

3. Prevention by mild irritants of gastric necrosis produced in rats by sodium taurocholate

   • Tarun K. Chaudhury
   • André Robert

   Original Articles Pages: 830 - 836

4. Exogenous and endogenous acid and pepsins in the pathogenesis of duodenal ulcers in the rat

   • S. N. Joffe
   • N. B. Roberts
   • J. H. Baron

   Original Articles Pages: 837 - 841

5. A dynamic study of rectally absorbed ammonia in liver cirrhosis using [¹³N] ammonia and a positron camera

   • Hirofumi Koen
   • Kunio Okuda
   • Noboru Arimizu

   Original Articles Pages: 842 - 848

6. Increase in pepsin content in gastric mucosa during the course of aspirin-and taurocholate-induced gastric ulceration in rats

   • Keiji Ohe
   • Hitoshi Yokoya
   • Akima Miyoshi

   Original Articles Pages: 849 - 856

7. Dysfunctions of the stomach with gastric ulceration

   • Laurence J. Miller
   • Juan-R. Malagelada
   • Vayliang W. Go

   Original Articles Pages: 857 - 864

8. Effect of human gastrin infusion on gastric potential difference in man

   • A. Tarnawski
   • J. E. McGuigan
   • K. J. Ivey

   Original Articles Pages: 865 - 868

9. Hormonal influences on chemical carcinogenesis: Studies with the aflatoxin B₁ hepatocarcinoma model in the rat

   • Antonio Chedid
   • Clarke J. Halfman
   • Stephen R. Greenberg

   Original Articles Pages: 869 - 874

10. Simultaneous hepatic and renal involvement in acute syphilis

    • Edwin B. Morrison
    • Daniel A. Norman
    • William L. Henrich

    Case Report Pages: 875 - 878

11. Hemangioendothelial sarcoma of the liver associated with long-term estrogen therapy in a man

    • J. M. Ham
    • R. C. Pirola
    • R. L. Crouch

    Case Report Pages: 879 - 883

12. Hydralazine-induced liver injury

    • Susumu Itoh
    • Yoshitaka Yamaba
    • Yoshio Tsukada

    Case Report Pages: 884 - 887

13. Complementary use of computerized tomography and technetium scanning in the diagnosis of accessory spleen

    • Shobha N. Joshi
    • Michael K. Wolverson
    • Robert P. Perrillo

    Case Report Pages: 888 - 892

14. Risk factors in acute gastric mucosal bleeding

    • Janet D. Elashoff
    • Josep Terés
    • Antoni Rimola

    Letters to the Editor Pages: 893 - 894

15. Influence of ranitidine on antipyrine pharmacokinetics in healthy volunteers

    • Christoph Staiger
    • Bernd Simon
    • Horst Kather

    Letters to the Editor Pages: 894 - 894

16. News and notices

    News Pages: 895 - 896