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Approval was granted by the Ethics Committee of the National Center for Child Health and Development (Approval number: 2021\u2013100).","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval"}},{"value":"Informed consent for participating in this study was not required in accordance with the Declaration of Helsinki and the Ethical Guidelines for Medical and Health Research Involving Human Subjects of the Ministry of Health, Labor, and Welfare.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"Consent for publication was waived in accordance with the guidelines.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to publish"}},{"value":"The authors have no relevant financial or non-financial interests to disclose.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Financial interests"}},{"value":"Koichi Kamei has received research funding from the Public Foundation of Vaccination Research Center, and the Taiju Life Social Welfare Foundation; donations from Chugai Pharmaceutical Co. Ltd., Teijin Pharma Ltd., Kyowa Kirin Co. Ltd., Shionogi & Co. Ltd., Daiichi Sankyo Co. Ltd., Mitsubishi Tanabe Pharma Co. Ltd., and Otsuka Pharmaceutical Co. Ltd.; and lecture fees from Terumo Co. Ltd., Baxter Ltd., and Zenyaku Kogyo Co. Ltd. Shuichi Ito has received research funding from Asahi Kasei Pharma, Chugai Pharmaceutical Co. Ltd., Zenyaku Kogyo Co. Ltd.; and lecture fees from Astellas Pharma Ltd., Asahi Kasei Pharma, Chugai Pharmaceutical Co. Ltd., Zenyaku Kogyo Co. Ltd., and Novartis Pharma. Kenji Ishikura has received research funding from Asahi Kasei Pharma, Astellas Pharma Ltd., Chugai Pharmaceutical Co. Ltd., Zenyaku Kogyo Co. Ltd.; and lecture fees from Astellas Pharma Ltd., Zenyaku Kogyo Co. Ltd., and Novartis Pharma; and consultant fees from Chugai Pharmaceutical Co. Ltd. The other authors have no conflicts of interest to disclose.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}]}}