1. Division of Nephrology and Endocrinology The University of Tokyo Hospital Tokyo Japan
2. Osteoporosis Center The University of Tokyo Hospital Tokyo Japan
3. Department of Orthopaedic Surgery, Panasonic Health Insurance Organization Matsushita Memorial Hospital Osaka Japan
4. Department of Bone and Mineral Research, Research Institute Osaka Women's and Children's Hospital Osaka Japan
5. Department of Rehabilitation, Panasonic Health Insurance Organization Matsushita Memorial Hospital Osaka Japan
6. Department of Geriatric Medicine, Graduate School of Medicine The University of Tokyo Tokyo Japan