About the Authors

Glenn Salkeld

To whom correspondence should be addressed. E-mail: glenns@health.usyd.edu.au

David Henry
Suzanne Hill
Danielle Lang
Nick Freemantle
Jefferson D'Assunção

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

GS designed the opinion poll questionnaire, was involved in the administration of the questionnaire in India, Iran, and South Africa, and was responsible for the data analysis and the writing of the paper. DH assisted in the design of the original questionnaire, was involved in the administration of the questionnaire in India, Iran, and South Africa, and contributed to the development of ideas and the writing of the paper. SH assisted in the design of the original questionnaire, was involved in the administration of the questionnaire in Bali, India, and Thailand, and contributed to the development of ideas and the writing of the paper. DL assisted in the design of the original questionnaire, was involved in the administration of the questionnaire in Thailand, and contributed to the analysis of data and the writing of the paper. NF was involved in the administration of the questionnaire in Bulgaria and contributed to the writing of the paper. JD conducted the analysis of data and contributed to the writing of the manuscript.