All authors approve the submission of this manuscript to the Korean Endocrine Society for publication and agree with the following.

Originality, authorship and publication ethics

• 1. I confirm that this manuscript is original and is not currently under consideration for publication by any other scientific journal.
• 2. I confirm that no part of this manuscript is duplicated or violates the copyright of others.
• 3. I attest that I have made an important scientific contribution to the study and have assisted with the drafting or revising of the manuscript in accordance with the definition of an author as stated by the International Committee of Medical Journal Editors (ICMJE).
• 4. I fully agree with the data and the conclusions presented in the final manuscript.
• 5. I declare that I have adhered to the publication and research ethics defined by Endocrinology and Metabolism (http://www.e-enm.org).

Copyright assignment agreement

I hereby assign all rights, including but not limited to the copyright, for this manuscript to Korean Endocrine Society upon its acceptance for publication, and acknowledge that the Korean Endocrine Society has the right to publish, republish, transmit, sell, and distribute the manuscript in the journal or other media.

Potential conflict of interest disclosure

We declare that potential conflicts of interest for all Authors, or acknowledgments that no conflicts exist, are included in the manuscript’s Acknowledgments section. Disclosures include financial support for this study, consultation fees, stocks, and relationships with any company whose products or services are related to the subject matter of the manuscript.

I agree to the terms outlined herein and approve the submission of this manuscript to the Korean Endocrine Society for publication

• * A copyright transfer agreement and disclosure of conflict of interest form should be submitted electronically on the submission website after confirmation of publication.
  Publications in the journal are licensed under the Creative Commons (Attribution-Noncommercial) license at:https://creativecommons.org/licenses/by-nc/4.0/legalcode