1. Department of Cellular Physiology and Signal Transduction, Sapporo Medical University School of Medicine, Sapporo, Japan
2. Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
3. Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
4. Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan