1. Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan; Department of Psychosomatic Internal Medicine, Nihon University Itabashi Hospital, Tokyo, Japan
2. Division of Pharmacology, Nihon University School of Medicine, Tokyo, Japan
3. Himawari Home Clinic, Tokyo, Japan
4. College of Nursing Art and Science, University of Hyogo, Japan