1. Department of Clinical Pharmacology and Therapeutics, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hazama-machi, Yufu, Oita 879-5593, Japan
2. General Clinical Research Center, Oita University Hospital, 1-1 Idaigaoka, Hazama-machi, Yufu, Oita 879-5593, Japan
3. Clinical Pharmacology Center, Oita University Hospital, 1-1 Idaigaoka, Hazama-machi, Yufu, Oita 879-5593, Japan
4. Department of Medical Ethics, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hazama-machi, Yufu, Oita 879-5593, Japan