1. Clinical Development Department, R&D Division, Daiichi Sankyo Co., Ltd, Tokyo
2. Department of Anesthesiology, Shimane University Faculty of Medicine, Shimane
3. Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto
4. Department of Palliative Medicine, Teikyo University School of Medicine, Tokyo, Japan
5. Biostatistics & Data Management Department, R&D Division, Daiichi Sankyo Co., Ltd, Tokyo