W. A. Stillings

A controlled study of the association between ulcerative colitis and psychiatric diagnoses

J. Helzer, D. Alpers, C. Norland, 1982, Digestive Diseases and Sciences.

A Study of the Association Between Crohn's Disease and Psychiatric Illness

J. Helzer, D. Alpers, C. Norland, 1984 .

A study of the association between Crohn's disease and psychiatric illness.

J. Helzer, D. Alpers, C. Norland, 1984, Gastroenterology.