1. From the Department of Medicine (J.K.D., A.B., S.G., O.Q.), University of California, San Diego, La Jolla; and the Research Institute for Internal Medicine (J.K.D., T.W., C.S., W.J.S., P.A.), the Department of Cardiology (T.W.), and the Section of Clinical Immunology and Infectious Diseases (P.A.), Rikshospitalet, University of Oslo, Norway.