1. Department of Epidemiology and BiostatisticsUniversity of Arizona Tucson Arizona
2. Trauma Research ProgramChandler Regional Medical Center Chandler Arizona
3. University of Arizona Cancer Center Tucson Arizona
4. Department of Nutritional SciencesUniversity of Arizona Tucson Arizona
5. Department of Physical TherapyCollege of Applied Health Sciences, University of Illinois at Chicago Chicago Illinois
6. Department of EpidemiologyGraduate School of Public Health, University of Pittsburgh Pittsburgh Pennsylvania
7. Family Medicine and Public HealthSchool of Medicine, University of California, San Diego La Jolla California
8. Stanford Prevention Research CenterSchool of Medicine, Stanford University Stanford California