W. Henry Mosley, Lincoln C. Chen, editors ; based on papers for a workshop by the same title organized by the Rockefeller and Ford Foundations, Bellagio, Italy, October 1983
sponsored by the National Institutes of Health and held at the School of Medicine, University of Minnesota--Duluth, Duluth, Minnesota, August 1-3, 1984 ; edited by Edwin W. Haller, Ruth A. Myers