1. Department of Medicine, Endocrinology Section and the Harold Hamm Diabetes Center University of Oklahoma Health Sciences Center Oklahoma City Oklahoma USA
2. Cardiac Pacing and Electrophysiology Department The First Affiliated Hospital of Xinjiang Medical University Urumqi China
3. Department of Cardiology Renmin Hospital of Wuhan University Wuhan Hubei China
4. Section of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology University of Oklahoma Health Sciences Center, Oklahoma Oklahoma USA