1. Shimane Prefectural Institute of Public Health and Environmental Science; Matsue Shimane 690-01
2. Nishino Children's Clinic; Matsue Shimane 690
3. Department of Pediatrics; Gotsu Saiseikai Hospital; Gotsu Shimane 695
4. Department of Virology; Tottori University School of Medicine; Yonago Tottori 683