1. Johns Hopkins Bloomberg School of Public Health, Doctoral Candidate, Baltimore, MD, USA
2. Department of Health, Utah Valley University, Orem, Utah, USA
3. Department of Health Science, Brigham Young University, Provo, Utah, USA,
4. Utah Department of Public Health, Salt Lake City, Utah, USA
5. Columbia University, Mailman School of Public Health, New York, USA
6. Sanofi-Aventis Pharmaceuticals, Paris, France