About the Authors

William A. Wells

william.wells@tballiance.org

Affiliation Global Alliance for TB Drug Development, New York, New York, United States of America

Colin Fan Ge

Affiliation IMS Health, New York, New York, United States of America

Nitin Patel

Affiliation IMS Health, New York, New York, United States of America

Teresa Oh

Affiliation IMS Health, New York, New York, United States of America

Elizabeth Gardiner

Affiliation Global Alliance for TB Drug Development, New York, New York, United States of America

Michael E. Kimerling

Affiliation Bill and Melinda Gates Foundation, Seattle, Washington, United States of America

Competing Interests

CFG, TO and NP are employed by IMS Health, Inc., which is a for-profit company that markets the databases used as primary data sources in this study. This does not alter the adherence by all authors to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: WAW CFG. Performed the experiments: WAW CFG TO. Analyzed the data: WAW CFG NP TO EG MEK. Wrote the paper: WAW CFG. Initiated the study concept: WAW. Critically revised and contributed to the final draft of the manuscript: WAW CFG NP TO EG MEK.