1. From the Department of Medicine (A.X., A.W.K.T., B.M.Y.C., N.M.S.W., C.H.Y.F., D.C.Y.Y., K.S.L.L.), Research Centre of Heart, Brain, Hormone, and Healthy Aging (A.X., B.M.Y.C., Y.W., K.S.L.L.), and Genome Research Centre (Y.W., P.C.S.), University of Hong Kong, and Department of Clinical Biochemistry (E.D.J.), Queen Mary Hospital, Hong Kong, China. Dr Janus is now with the Department of Medicine, University of Melbourne, Western Hospital, Footscray, Australia.