About the Authors

Eric A. Finkelstein

eric.finkelstein@duke-nus.edu.sg

Affiliations Health Services and Systems Research Program, Duke-NUS Graduate Medical School, Singapore, Singapore, Global Health Institute, Duke University, Durham, North Carolina, United States of America

Junxing Chay

Affiliation Health Services and Systems Research Program, Duke-NUS Graduate Medical School, Singapore, Singapore

Shailendra Bajpai

Affiliation Medical Affairs, Sanofi-aventis, Singapore, Singapore

Competing Interests

One of the authors, Shailendra Bajpai, is an employee of Sanofi-Aventis. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. Funding for this project was provided from Sanofi-Aventis Singapore Pte. Ltd. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. Publication of the study results was not contingent upon sponsor's approval.

Author Contributions

Conceived and designed the experiments: EAF SB JC. Analyzed the data: JC EAF. Wrote the paper: JC EAF SB.