1. First Clinical Medical College of LanZhou University Lanzhou GanSu PR China
2. Clinical Laboratory, Affiliated Hospital of Northwest Minzu University Lanzhou GanSu PR China
3. The Reproductive Medicine Special Hospital of the 1st Hospital of Lanzhou University Lanzhou GanSu PR China
4. Key Laboratory for Reproductive Medicine and Embryo of Gansu Province Lanzhou GanSu PR China