1. Kern F, Jr: Second conference on digestic disease as a national problem-final report. Gastroenterology 68:1345?1416, 1975
2. Kern F, Jr: Second conference on digestic disease as a national problem-final report. Gastroenterology 68:1381, 1975
3. Perkoff GT, Kahn L, Haas P: The effects of an experimental prepaid group practice on medical care utilization and cost. Med Care 14:432?449, 1976
4. Marsland DW, Wood M, Mayo F: A data bank for patient care, curriculum, and research: 526, 196 patient problems. J Fam Pract 3:25?68, 1976
5. Division of Research and Statistics, Health Insurance Plan of Greater New York, Annual Report 1973, 625 Madison Avenue, New York, New York 10022.