About the Authors

Chin-Sung Chang

Affiliations Department of Family Medicine, National Cheng Kung University Hospital, Tainan, Taiwan, Graduate Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan

Yin-Fan Chang

Affiliation Department of Family Medicine, National Cheng Kung University Hospital, Tainan, Taiwan

Ping-Yen Liu

Affiliation Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan

Chuan-Yu Chen

Affiliation Tianliao District Public Health Center, Kaohsiung City, Taiwan

Yau-Sheng Tsai

Affiliation Graduate Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan

Chih-Hsing Wu

paulo@mail.ncku.edu.tw

Affiliation Department of Family Medicine, National Cheng Kung University Hospital, Tainan, Taiwan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CSC YFC CYC CHW. Performed the experiments: CSC YFC PYL CYC YST CHW. Analyzed the data: CSC YFC CHW. Contributed reagents/materials/analysis tools: CSC YFC PYL CYC YST CHW. Wrote the paper: CSC CHW.