1. Institute of Neural Tissue Engineering, Mudanjiang College of Medicine, Mudanjiang, China
2. Department of Anatomy, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
3. Center for Reproductive Biology and Health, College of Agricultural Sciences, The Pennsylvania State University, University Park, PA, USA
4. Department of Otorhinolaryngology, The Second Affiliated Hospital, Mudanjiang College of Medicine, Mudanjiang, China
5. Department of Pharmacology, Mudanjiang College of Medicine, Mudanjiang, China
6. Department of Basic Psychological, Mudanjiang College of Medicine, Mudanjiang, China