Funding for this research was provided by:
Japan Society for the Promotion of Science (JP20K16102)
Received: 15 September 2021
Accepted: 16 May 2022
First Online: 21 May 2022
: The present study was reviewed and approved by the Ethics Committee of the National Institute of Public Health (Approval No, NIPH-IBRA#12314), and implemented under “Ethical Guidelines for Medical and Health Research Involving Human Subjects” in Japan. The need for informed consent was waived by the Ethics Committee of the National Institute of Public Health because the present study used a commercial database accumulating administrative claims data.
: Not applicable.
: The authors declare that they have no competing interests.