Funding for this research was provided by:
Novo Nordisk Korea
Article History
Received: 25 October 2020
Accepted: 16 February 2021
First Online: 20 March 2021
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board at the Korea National Institute for Bioethics Policy (P01–201909–21-010). However, informed consent had not been applied due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.