About the Authors

Jung Yeon Heo

Affiliation Department of Preventive Medicine, Korea University Medical College, Seoul, Korea

Soung Hoon Chang

Affiliation Department of Preventive Medicine, Konkuk University, School of Medicine, Chungju, Korea

Min Jung Go

Affiliation Department of Preventive Medicine, Korea University Medical College, Seoul, Korea

Young Mee Kim

Affiliation Department of Preventive Medicine, Korea University Medical College, Seoul, Korea

Sun Hye Gu

Affiliation Department of Preventive Medicine, Korea University Medical College, Seoul, Korea

Byung Chul Chun

chun@korea.ac.kr

Affiliation Department of Preventive Medicine, Korea University Medical College, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SHG BCC. Performed the experiments: SHC YMK MJG SHG BCC. Analyzed the data: JYH BCC. Wrote the paper: JYH BCC.