About the Authors

Kalpana Gupta

Kalpana.gupta@va.gov

Affiliations The National Center for Occupational Health and Infection Control (COHIC), Office of Public Health, Department of Veterans Affairs, Gainesville, Florida, United States of America, Department of Medicine, Veterans Affairs Boston Health Care System, West Roxbury, Massachusetts, United States of America, Massachusetts Veterans Epidemiology Research and Information Center, Jamaica Plain, Massachusetts, United States of America, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, United States of America

Richard A. Martinello

Affiliations Veterans Health Administration, Office of Public Health, Washington, D. C., United States of America, Departments of Medicine and Pediatrics, Yale School of Medicine, New Haven, Connecticut, United States of America

Melissa Young

Affiliation Massachusetts Veterans Epidemiology Research and Information Center, Jamaica Plain, Massachusetts, United States of America

Judith Strymish

Affiliations Department of Medicine, Veterans Affairs Boston Health Care System, West Roxbury, Massachusetts, United States of America, Harvard Medical School, Boston, Massachusetts, United States of America

Kelly Cho

Affiliations Massachusetts Veterans Epidemiology Research and Information Center, Jamaica Plain, Massachusetts, United States of America, Harvard Medical School, Boston, Massachusetts, United States of America

Elizabeth Lawler

Current address: Generation Health, Inc., Boston, Massachusetts, United States of America

Affiliations Massachusetts Veterans Epidemiology Research and Information Center, Jamaica Plain, Massachusetts, United States of America, Harvard Medical School, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Reviewed and revised the manuscript critically for important intellectual content and approved of the final version: KG RM JS MY KC EL.. Conceived and designed the experiments: KG RM JS KC EL. Analyzed the data: MY KC EL. Wrote the paper: KG.