1. Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan
2. Department of Clinical Biostatistics, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan
3. Department of Quality and Patient Safety Management, Chiba Cancer Center, Chiba, Japan
4. The Keihanshin Consortium for Fostering the Next Generation of Global Leaders in Research (K-CONNEX), Kyoto, Japan