1. Multidisciplinary Pain Center, Aichi Medical University, Aichi, Japan
2. Medical Affairs Division, Medical Science Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
3. Quality & Safety Management Division, Safety and Risk Management Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
4. R&D Division, Biostatistics & Data Management Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
5. Rx Group, Data Solution Division, Japan Medical Information Research Institute, Inc., Tokyo, Japan