1. From the Department of Medicine (Z-J.C., M.V., S.L., D.C., Y.D., C-H.C.), Case Western Reserve University and University Hospital of Cleveland, Ohio; Department of Medicine (Z-J.C.), Reproductive Research Center, Shandong Provincial Hospital, Shandong University, Jinan, P.R. China; Graduate Institute of Biochemical Sciences (G-D.C.), National Taiwan University, Taipei, Taiwan; and Department of Molecular Biology (S.S.K.), Kyung Hee University, Seoul, Korea.