1. Department of Food and Nutrition, Hanyang University, Seoul, Korea.
2. Department of Obstetrics and Gynecology, The Catholic University of Korea College of Medicine, Seoul, Korea.
3. Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, Korea.
4. Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
5. Department of Orthopaedic Surgery, College of Medicine, Hanyang University, Seoul, Korea.
6. Department of Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea.
7. Department of Endocrinology and Metabolism, Kyung Hee University School of Medicine, Kyung Hee Hospital at Gangdong, Seoul, Korea.