1. Department of Medical Genetics, the Second Military Medical University, Xiangyin Road 800 Shanghai 200433, P. R. China
2. Laboratory of Structural Biology with Visiting Scientists, Institute of Biochemistry and Cell Biology (IBCB), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Yueyang Road 320 Shanghai 200031, P. R. China
3. Laboratory of Molecular Endocrinology and Oncology, Centre Hospitalier de Université Laval Research Center (CHUL, CHUQ) and Laval University, Québec, G1V 4G2, Canada