About the Authors

Hye Won Kim

Contributed equally to this work with: Hye Won Kim, Yang-Hyun Kim

Affiliation Department of Family Medicine, College of Medicine, Korea University, Seoul, Korea

Yang-Hyun Kim

Contributed equally to this work with: Hye Won Kim, Yang-Hyun Kim

Affiliation Department of Family Medicine, College of Medicine, Korea University, Seoul, Korea

Kyungdo Han

Affiliation Department of Biostatistics, College of Medicine, Catholic University, Seoul, Korea

Ga Eun Nam

Affiliation Department of Family Medicine, College of Medicine, Korea University, Seoul, Korea

Gwang Seon Kim

Affiliation Department of Family Medicine, College of Medicine, Korea University, Seoul, Korea

Byoung-Duck Han

Affiliation Department of Family Medicine, College of Medicine, Korea University, Seoul, Korea

Anna Lee

Affiliation Department of East Asian Languages, College of Language, Linguistic, and Literature, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America

Ji Yong Ahn

ji110@hanmail.net (JYA); basslove1@hanmail.net (BJK)

JYA and BJK also contributed equally to this work.

Affiliation Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

Byung Joon Ko

ji110@hanmail.net (JYA); basslove1@hanmail.net (BJK)

JYA and BJK also contributed equally to this work.

Affiliations Department of Family Medicine, College of Medicine, Korea University, Seoul, Korea, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HWK YHK JYA BJK. Analyzed the data: BJK KH. Contributed to the writing of the manuscript: HWK YHK JYA BJK KH GEN GSK BDH AL. Collected data: GEN GSK BDH. Provided critical revision of the manuscript and contributed to the discussion: AL.