About the Authors
- Sibel Ascioglu
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* E-mail: ascioglu@hacettepe.edu.tr
Affiliation Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America
- K. Arnold Chan
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Affiliation Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America
Competing Interests
The authors have the following interests: The study was supported by the Pharmacoepidemiology Program at Harvard School of Public Health, which received unrestricted donations from the following pharmaceutical companies for education and training purpose (Pfizer, Novartis, Aventis and Weyth). There are no patents, products in development or marketed products to declare. This does not alter our adherence to all the PLoS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: SA KAC. Performed the experiments: SA KAC. Analyzed the data: SA. Contributed reagents/materials/analysis tools: SA KAC. Wrote the paper: SA KAC.