Kishimoto, Makiko
Yamaguchi, Arisa
Niimura, Marina
Mizumoto, Miki
Hikitsuchi, Tatsuo
Ogawa, Kohei
Ozawa, Nobuaki
Tachibana, Yoshiyuki
Article History
Received: 17 January 2021
Accepted: 20 August 2021
First Online: 26 August 2021
Declarations
:
: This study was approved by the institutional review board of the National Institute for Child and Health Development (Approval No. 2123, Approval Date: 2020/2/28). Informed consent was obtained in the form of an opt-out option on the official website of the institution in 2019. As this study was a retrospective observational study which used existing information such as medical records, and the analysis was conducted in an anonymized state, the ethics committee approved the opt-out method for obtaining participant consent according to the research ethics guidelines in Japan. All the study procedures were carried out in accordance with the principles in Declaration of Helsinki 1964 and its amendments later on.
: This article does not disclose any personal identifiable data in any form and privacy rights of the participants were observed. Hence, consent to publication is not applicable here.
: The authors declare that they have no competing interests.