1. Department of Endocrinology and Metabolism The First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China
2. Division of Endocrinology Department of Medicine Baylor College of Medicine Houston TX 77030 USA
3. National Center for International Research on Animal Gut Nutrition College of Animal Science and Technology Nanjing Agricultural University Nanjing 210095 China
4. Department of Biochemistry and Molecular Biology McGovern Medical School University of Texas Health Science Center at Houston Houston TX 77030 USA
5. Department of Molecular and Developmental Medicine University of Siena Siena 53100 Italy
6. Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University Shanghai Key Laboratory of Embryo Original Diseases Shanghai 200011 China
7. Department of Molecular and Cellular Biology Baylor College of Medicine Houston TX 77030 USA