1. 1National Clinical Research Center for Metabolic Diseases, Key Laboratory of Diabetes Immunology, Ministry of Education, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
2. 2Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, Hunan, China
3. 3NHC Key Laboratory of Hunan Stem Cell and Reproductive Engineering, Central South University, Changsha, Hunan, China
4. 4National Engineering Research Centre of Human Stem Cells, Changsha, Hunan, China