Keio University, Keio University - Department of Infectious Diseases, Keio University, Keio University Hospital Clinical and Translational Research Center, Keio University, Tokyo University of Pharmacy and Life Sciences, Keio University, Keio University, Keio University, Keio University - School of Medicine, Keio University - Division of Pulmonary Medicine, Keio University, Keio University, Keio University, Keio University, Keio University, Keio University - Department of Preventive Medicine and Public Health, Keio University and Keio University, School of Medicine, Center for Infectious Diseases and Infection Control

affiliation not provided to SSRN, Japanese Red Cross Ashikaga Hospital - Department of Pediatrics, National Institute of Infectious Diseases, Keio University - Department of Pediatrics and Keio University