1. College of Physicians and Surgeons (S.J.S., M.R.R., J.P.B.), Columbia University, New York, New York 10032
2. Cleveland Clinic Foundation (C.F.), Cleveland, Ohio 44195
3. Indiana University School of Medicine (M.P.), Indianapolis, Indiana 46202
4. Department of Veterans Affairs Medical Center (D.M.S.), University of California, San Francisco, San Francisco, California 94143
5. Mayo Clinic College of Medicine (R.C.S.), Jacksonville, Florida 32224
6. Amgen Inc. (L.E.S., K.A.O., P.K.), Thousand Oaks, California 91320