1. School of Biomedical Sciences (L.C., J.L., Y.L., C.H.K.C.), The Chinese University of Hong Kong-Shandong University Joint Laboratory on Reproductive Genetics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
2. The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China; and College of Life Sciences (J.L.), Northwest Normal University, Lanzhou 730070, China