Affiliation: | (1) the New England Deaconess Hospital, Boston, Massachusetts;(2) the Harvard Medical School, Boston, Massachusetts;(3) the Harvard School of Public Health, Boston, Massachusetts;(4) the University of California, Los Angeles;(5) School of Medicine, Los Angeles, California;(6) the Sepulveda VA Medical Center, Sepulveda, California;(7) RAND, Santa Monica, California;(8) the New England Medical Center, Boston, Massachusetts;(9) the New England Research Institute, Watertown, Massachusetts;(10) the Beth Israel Hospital, Boston, Massachusetts;(11) Division of General Internal Medicine, New England Deaconess Hospital, One Autumn Street, 02215 Boston, MA |