1. Department of Cardiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, PR China;
2. Department of Gastroenterology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, PR China;
3. Department of the Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, PR China;
4. Department of the Obstetrics and Gynecology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, PR China