Received: 25 May 2022
Accepted: 23 August 2022
First Online: 8 September 2022
: The KNHANES and KARE protocols were reviewed and approved by the Institutional Review Board of the Korea Centers for Disease Control and Prevention. The Ewha-Boramae study was approved by the Institutional Review Board of Seoul National University Boramae Medical Center and EwhaWomans University. Informed consent was obtained from all study participants. The present study was exempted from requirements for written informed consent and was approved by the the Institutional Review Boards at Ewha Womans University. All the steps/ methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.