1. From the Departments of Medicine (T. Takahashi, T. Tang, N.C.L., W.Y.W.L., H.K.H.) and Anesthesiology (D.M.R.), University of California, San Diego, and VA San Diego Healthcare System (T. Takahashi, T. Tang, N.C.L., D.M.R., B.R., M.S., W.Y.W.L., P.C., H.K.H.), San Diego, Calif.