1. Department of Endocrinology and Metabolism, University of Tsukuba, Ibaraki, Japan
2. Department of Orthopedic Surgery, University of Tsukuba, Ibaraki, Japan
3. Department of Exercise Physiology, University of Tsukuba, Ibaraki, Japan
4. Department of Physiology, Bioscience Research Department, Tsukuba Research Laboratory, Toagoei Co Ltd, Ibaraki, Japan