About the Authors

Sharon L. McDonnell

sharon@grassrootshealth.org

Affiliation GrassrootsHealth, Encinitas, California, United States of America

Carole Baggerly

Affiliation GrassrootsHealth, Encinitas, California, United States of America

Christine B. French

Affiliation GrassrootsHealth, Encinitas, California, United States of America

Leo L. Baggerly

Affiliation GrassrootsHealth, Encinitas, California, United States of America

Cedric F. Garland

Affiliation Department of Family Medicine and Public Health, University of California San Diego, La Jolla, California, United States of America

Edward D. Gorham

Affiliation Department of Family Medicine and Public Health, University of California San Diego, La Jolla, California, United States of America

Joan M. Lappe

Affiliation Department of Medicine, Creighton University, Omaha, Nebraska, United States of America

Robert P. Heaney

Affiliation Department of Medicine, Creighton University, Omaha, Nebraska, United States of America

Competing Interests

Bio-Tech Pharmacal was a commercial source of funding. It did not have any relationship with GrassrootsHealth, UC San Diego, or Creighton University with regard to employment, patents, projects in development, or products marketed. Representatives of this source did not review the manuscript or play any role in design, analysis, or writing of the manuscript and had no control over any decision to publish it. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JML RPH CB LLB CBF CFG. Performed the experiments: JML RPH CB CBF. Analyzed the data: RPH SLM LLB. Wrote the paper: SLM CB CBF LLB CFG EDG RPH.