Shinjo, Daisuke
Tachimori, Hisateru
Maruyama-Sakurai, Keiko
Fujimori, Kenji
Inoue, Norihiko
Fushimi, Kiyohide http://orcid.org/0000-0002-1894-0290
Funding for this research was provided by:
Ministry of Health, Labour and Welfare (H29-Seisaku-Shitei-009)
Japan Society for the Promotion of Science (16K19284)
Article History
Received: 3 June 2020
Accepted: 27 April 2021
First Online: 5 May 2021
Declarations
:
: This study was approved by the Institutional Review Board at the Tokyo Medical and Dental University and the National Center for Child Health and Development. The board waived off the requirement for patient informed consent because of the anonymous nature of the data. The approval to access the administrative database (anonymized database) maintained by the DPC research group, located in Japan requires the data to be treated as confidential with protected and secure access. For this reason, the data cannot be shared publicly. However, processed data which we used in this study will be available for researchers who meet the criteria for data access. Request to access data should be submitted to corresponding author. We had permission for accessing a partial dataset (for this research purpose) from the DPC research group.
: Not applicable.
: The authors declare that they have no competing interests.