About the Authors

Soo-Yon Rhee

Affiliation Division of Infectious Diseases, Department of Medicine, Stanford University, Stanford, California, United States of America

Tommy F Liu

Affiliation Division of Infectious Diseases, Department of Medicine, Stanford University, Stanford, California, United States of America

Susan P Holmes

Affiliation Department of Statistics, Stanford University, Stanford, California, United States of America

Robert W Shafer

To whom correspondence should be addressed. E-mail: rshafer@stanford.edu

Affiliation Division of Infectious Diseases, Department of Medicine, Stanford University, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

RWS, SYR, and SPH conceived and designed the experiments. SYR performed the experiments. All authors contributed to analyzing the data. TFL and SPH contributed reagents/materials/analysis tools. SYR and RWS wrote the paper.