1. Department of Obstetrics and Gynecology Xiangya Hospital of Central South University Changsha China
2. Department of Biochemistry University of Texas Southwestern Medical Center Dallas TX USA
3. Department of Physiology Second Military Medical University Shanghai P.R. China
4. Center for Human Nutrition University of Texas Southwestern Medical Center Dallas TX USA
5. Department of Molecular Genetics University of Texas Southwestern Medical Center Dallas TX USA
6. School of Medicine The International Peace Maternity and Child Health Hospital Shanghai Jiao Tong University Shanghai China
7. Department of Obstetrics and Gynecology University of Texas Southwestern Medical Center Dallas TX USA