Accepted for Publication: April 18, 2011.
Author Contributions: Study concept and design: Levis, Doerge, and Krischer. Acquisition of data: Levis, Strickman-Stein, Ganjei-Azar, Xu, and Doerge. Analysis and interpretation of data: Levis, Strickman-Stein, Ganjei-Azar, Xu, Doerge, and Krischer. Drafting of the manuscript: Levis, Strickman-Stein, and Doerge. Critical revision of the manuscript for important intellectual content: Levis, Ganjei-Azar, Xu, Doerge, and Krischer. Statistical analysis: Strickman-Stein, Xu, and Krischer. Obtained funding: Levis. Administrative, technical, and material support: Levis, Strickman-Stein, Ganjei-Azar, Doerge, and Krischer. Study supervision: Levis.
Financial Disclosure: None reported.
Funding/Support: National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, grant RO1AR048932-01A1 (Dr Levis).
Role of the Sponsor: The funding agency did not have any role in the design and conduct of the study; the collection, management, analysis, and interpretation of the data; and the preparation, review, or approval of the manuscript.
Additional Contributions: We thank Lisa Rafkin-Mervis, MS, CDE, for her assistance with the study design; Bianca Valme, MPH, for her assistance with the cytology samples; and Ann Herrin, RN, Sylvia Morales, RN, Patricia Bryan, BSN, MPH, Rafael Franjul, and Ashley Barrera for their assistance in the conduct of the study. All were University of Miami employees and supported by the study grant.