About the Authors

Yaw-Wen Chang

Affiliation Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan

Wei-Liang Chen

Affiliation Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan

Fu-Gong Lin

Affiliation School of Public Health, National Defense Medical Center, Taipei, Taiwan

Wen-Hui Fang

Affiliation Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan

Ming-Yung Yen

Affiliation Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan

Chia-Chuan Hsieh

Affiliation Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan

Tung-Wei Kao

ktw61916@yahoo.com.tw

Affiliation Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: Y-WC T-WK. Performed the experiments: Y-WC M-YY C-CH W-HF. Analyzed the data: Y-WC F-GL. Wrote the paper: Y-WC W-LC.