1. Department of Orthopaedic Surgery; Nagoya University Graduate School of Medicine; Nagoya Japan
2. Department of Cardiology; Nagoya University Graduate School of Medicine; Nagoya Japan
3. Department of Orthopaedic Surgery; Nagoya Memorial Hospital; Nagoya Japan
4. Department of Orthopaedic Surgery; Nagoya Daini Red Cross Hospital; Nagoya Japan
5. Department of Geriatrics; Nagoya University Graduate School of Medicine; Nagoya Japan