About the Authors

Sung Yae Shin

Affiliation Department of Quality Improvement and Patient Safety, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea

Sang Gyu Lee

leevan@yuhs.ac

Affiliation Department of Hospital Management, Graduate School of Public Health, Yonsei University, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SGL. Performed the experiments: SYS. Analyzed the data: SYS. Contributed reagents/materials/analysis tools: SYS. Wrote the paper: SYS.