1. Massachusetts General Hospital (B.M.K.B.), Boston, Massachusetts 02114;
2. Oregon Health Sciences University (M.H.S., D.M.C.), Portland, Oregon 97201;
3. Lilly Research Laboratories (A.Z., J.J.C., M.L.H.), Eli Lilly \|[amp ]\| Co., Indianapolis, Indiana 46285;
4. University Hospital of Cleveland (B.M.A.), Cleveland, Ohio 44106;
5. Cedars Sinai Medical Center (V.B.), Los Angeles, California 90048;
6. New York University Medical Center (S.S., D.L.K.), New York, New York 10010