1. Columbia University Medical Center (M.T.Y., D.J.M., C.A.Z., A.S., R.S., I.C., J.F.D., S.M.H., E.S.), New York, New York 10032
2. Bronx-Lebanon Hospital Center (D.C.F.), Bronx, New York 10456
3. Weill Cornell Medical College (J.L.), New York, New York 10065