1. Department of Obstetrics and Gynecology, Chungbuk National University (CBNU), Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk, 28644, Korea
2. Department of Pharmacology, CBNU, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk, 28644, Korea
3. Department of Physiology, College of Medicine, CBNU, Chungdae-ro 1, Cheongju, Chungbuk, 28644, Korea
4. Department of Physiology, College of Medcine, Shanghai Jiaotong University, 800 Dongchun Rd. Shanghai, 200240, P.R. China
5. Department of Medical Education, College of Medicine, CBNV, Chungdae-ro 1, heongju, Chungbuk, 28644, Korea