1 Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, 1-185, Kohasu, Oko-cho, Nankoku City, Kochi 783-8505, Japan.
2 Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, 1-185, Kohasu, Oko-cho, Nankoku City, Kochi 783-8505, Japan and Health Care Center, Kochi University, 1-5-2, Akebono-cho, Kochi City, Kochi 780-8520, Japan.
3 Department of Orthopaedic Surgery, Kochi Medical School, Kochi University, 1-185, Kohasu, Oko-cho, Nankoku City, Kochi 783-8505, Japan.