References
- Pearl RK, Abcarian H. Nonoperative therapy for hemorrhoids. Infect Surg 1989 Nov: 411–7
- Corman ML. Colon and rectal surgery. 2d ed. Philadephia: JB Lippincott, 1989: 49–105
- Leicester RJ, Nicholls RJ, Mann CV. Infrared photocoagulation: a new treatment for hemorrhoids. Dis Colon Rectum 1981: 24(8): 602–5
- Update of American Cancer Society guidelines for detection of colorectal cancer. CA1989: 39(5): 317