Accepted for Publication: February 7, 2015.
Published Online: April 29, 2015. doi:10.1001/jamadermatol.2015.0351.
Study concept and design: Wilkes, Wright, du Plessis.
Acquisition, analysis, or interpretation of data: Wilkes, Wright, Reeder.
Drafting of the manuscript: Wilkes, Wright, Reeder.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Wilkes, Wright.
Obtained funding: Wilkes, Wright.
Administrative, technical, or material support: Wright.
Study supervision: Wright.
Conflict of Interest Disclosures: Mr Wilkes is a doctoral student at Cornell University supported by a National Science Foundation Graduate Research Fellowship. Dr Wright was employed by the Council for Scientific and Industrial Research (CSIR) in South Africa. Dr Reeder is a member of the National Health Promotion Advisory Committee, Cancer Society of New Zealand, Inc.
Funding/Support: This study is supported by grant NSF DGE-1144153 from the National Science Foundation Graduate Research Fellowship Program (Mr Wilkes); by an international travel allowance cofunded through the Graduate Research Opportunities Worldwide and US Agency for International Development agencies; by CSIR Parliamentary Grant funding (Dr Wright); by the National Research Foundation Rated Researcher funding (Dr Wright); by an ad hoc grant from the Cancer Association of South Africa (Dr Wright); by the Cancer Society of New Zealand, Inc (Dr Reeder); and by the University of Otago (Dr Reeder).
Role of the Funder/Sponsor: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation or the National Research Foundation.
Additional Contributions: We thank the participants in this study.
Correction: This article was corrected on August 12, 2015, to fix statistics in the Figure.