About the Authors

Robert Belknap

robert.belknap@dhha.org

Affiliation Denver Public Health, Denver Health and Hospital Authority, Denver, Colorado, United States of America

Steve Weis

Affiliation University of North Texas Health Science Center, Fort Worth, Texas, United States of America

Andrew Brookens

Affiliation Department of Medicine, University of Washington, Seattle, Washington, United States of America

Kit Yee Au-Yeung

Affiliation Proteus Digital Health, Inc., Redwood City, California, United States of America

Greg Moon

Affiliation Proteus Digital Health, Inc., Redwood City, California, United States of America

Lorenzo DiCarlo

Affiliation Proteus Digital Health, Inc., Redwood City, California, United States of America

Randall Reves

Affiliation Denver Public Health, Denver Health and Hospital Authority, Denver, Colorado, United States of America

Competing Interests

Proteus Digital Health which funded the study is also the employer of authors Kit Yee Au-Yeung PhD, Greg Moon M.D. and Lorenzo DiCarlo M.D. A novel RaisinTM is currently under development that electronically confirms medication ingestions using an ingestible event marker (Proteus Digital Health, Inc. Redwood City, CA). There are no further patents, products in development, or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: RB SW AB KA GM LD RR. Performed the experiments: RB SW RR. Analyzed the data: RB SW KA GM RR. Contributed reagents/materials/analysis tools: KA GM LD. Wrote the paper: RB SW AB KA GM LD RR.