1. Himawari Home Clinic; Sumino-kai Healthcare Corporation; Chiba Japan
2. Primary Care and Medical Education; Faculty of Medicine; University of Tsukuba; Tsukuba Japan
3. Division of Respiratory Medicine; Department of Internal Medicine; Nihon University School of Medicine; Tokyo Japan
4. Department of Psychosomatic Internal Medicine; Nihon University Itabashi Hospital; Tokyo Japan
5. General Medicine and Primary Care; University of Tsukuba Hospital; Tsukuba Japan