1. School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
2. Center for Reproductive Medicine, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, The Key Laboratory of Reproductive Endocrinology, Shandong University, Ministry of Education, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, Shandong 250021, P.R. China
3. Microwave Treatment Department, Central Hospital of Zibo (GaoQing Branch Courts), Zibo, Shandong 256300, P.R. China
4. Department of Anesthesiology and Shandong Provincial Medicine and Health Key Laboratory of Clinical Anesthesia, Weifang Medical University, Weifang, Shandong 261053, P.R. China
5. Department of Gerontology, The Second Hospital of Shandong University, Jinan, Shandong 250000, P.R. China