About the Authors

Chad Liu

Affiliation Department of Biomedical Engineering, Duke University, Durham, North Carolina, United States of America

Chuan-Yuan Li

Affiliation Department of Dermatology, Duke University Medical Center, Durham, North Carolina, United States of America

Fan Yuan

fyuan@duke.edu

Affiliation Department of Biomedical Engineering, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CL FY CYL. Performed the experiments: CL FY. Analyzed the data: CL FY. Contributed reagents/materials/analysis tools: CL FY CYL. Wrote the paper: CL FY CYL.