1. Kimura Children and Family Clinic; Shimane University Faculty of Medicine; Izumo Japan
2. Division of Health Administration and Promotion; Department of Social Medicine; Faculty of Medicine; Tottori University; Yonago Japan
3. Negi Clinic; Ohda Shimane Japan
4. Watanabe Children and Ladies Clinic; Shimane University Faculty of Medicine; Izumo Japan
5. Kobayashi Clinic; Matsue Japan
6. Department of Pediatrics; Shimane University Faculty of Medicine; Izumo Japan