1. From the University Departments of Medicine (K.W.T., M.C.-Y., W.K.L., P.C.W., B.L., M.S.I., J.C., K.N.L.), Clinical Microbiology (P.L.H., T.W., W.H.S., K.Y.Y.), and Diagnostic Radiology (G.C.O.), University of Hong Kong; the Department of Medicine, Kwong Wah Hospital (W.K.Y.); and the Department of Medicine, Pamela Youde Nethersole Eastern Hospital (L.Y.Y., T.M.C.) — all in Hong Kong, China.