1. From the Department of Medicine (L.E., M.S.H., R.Y.L., J.C., M.A.M., A.L.C., R.S.R.), University of California at San Diego School of Medicine, La Jolla; Veterans Administration San Diego Healthcare System (L.E., M.S.H., Y.Y., R.Y.L., J.C., R.S.R.), Calif; Department of Medicine (S.-Y.S.), Tulane University, New Orleans, La; and Department of Cell and Developmental Biology (S.J.K.), University of Illinois, Urbana. Present address for M.S.H.: Department of Medicine, David Geffen School of Medicine,...