About the Authors

You-Cheol Hwang

Contributed equally to this work with: You-Cheol Hwang, Hong-Yup Ahn

Affiliation Division of Endocrinology and Metabolism, Department of Medicine, Kyung Hee University School of Medicine, Kyung Hee University Hospital at Gangdong, Seoul, Korea

Hong-Yup Ahn

Contributed equally to this work with: You-Cheol Hwang, Hong-Yup Ahn

Affiliation Department of Statistics, Dongguk University-Seoul, Seoul, Korea

Woo Je Lee

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

Cheol-Young Park

cydoctor@chol.com

Affiliation Division of Endocrinology and Metabolism, Department of Internal Medicine, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea

Sung-Woo Park

Affiliation Division of Endocrinology and Metabolism, Department of Internal Medicine, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YCH CYP. Performed the experiments: YCH HYA CYP. Analyzed the data: YCH HYA WJL CYP SWP. Contributed reagents/materials/analysis tools: HYA. Wrote the paper: YCH.