1. Department of Pharmacoepidemiology, Graduate School of MedicineKyoto University, Yoshida‐Konoe‐cho Sakyo‐ku Kyoto Japan
2. Research and Development DivisionSanten Pharmaceutical Co., Ltd. Ofuka‐cho, Kita‐ku Osaka Japan
3. Keihanshin Consortium for Fostering the Next Generation of Global Leaders in Research Yoshida‐Honmachi, Sakyo‐ku Kyoto‐shi Kyoto Japan
4. Biostatistics Section, Clinical Research CenterChiba University Hospital Inohana, Chuo‐ku Chiba Japan
5. Department of Otolaryngology‒Head and Neck Surgery, Graduate School of MedicineKyoto University Yoshida‐Konoe‐cho, Sakyo‐ku Kyoto Japan