1. From Folkhälsan Institute of Genetics (J.F., C.F., K.P.-F., M.S., J.W., M.R., M.R.-B., C.-G.B., L.T., M.W., P.-H.G.), Folkhälsan Research Center; Department of Clinical Chemistry (M.W.); The Finnish Genome Center (M.W.), University of Helsinki; and Department of Medicine (J.F., C.F., K.P.-F., M.S., J.W., M.R., M.R.-B., C.-G.B., L.T., M.W., P.-H.G.), Division of Nephrology, Helsinki University Central Hospital, Helsinki, Finland.