1. Drug-Resistant Pathogen Surveillance Group in Pediatric Infectious Disease; Japan
2. Department of Pediatrics; Shikoku Medical Center for Children and Adults; Zentsuji Kagawa Japan
3. Department of Pediatrics, Fuji Heavy Industries Health Insurance Society; Ota Memorial Hospital; Ota Gunma Japan
4. Department of Pediatrics; Saitama Sekishinkai Hospital, Sayama; Saitama Japan
5. Kitasato Institute; Kitasato University Research Center for Anti-infectious Drugs; Tokyo Japan
6. Kitasato Institute; Kitasato University Research Organization for Infection Control Sciences; Tokyo Japan