Sheehan W, Kroll J
Department of Psychiatry, University of Minnesota Medical School, Minneapolis.
Am J Psychiatry. 1990 Jan;147(1):112-3. doi: 10.1176/ajp.147.1.112.
Of 52 psychiatric inpatients, 81% believed that factors such as proper diet, sleep, and exercise affect the development of illnesses, and 23% believed that sin-related factors, such as sinful thoughts or acts, have such an effect.