1. University of Cincinnati PO Box 210068 Cincinnati OH 45221‐0068 USA
2. Cincinnati Children's Hospital Medical Center, Division of Emergency Medicine University of Cincinnati, College of Medicine 3333 Burnet Avenue, MLC 2008 Cincinnati OH 45229 USA
3. Department of Kinesiology California State University Stanislaus One University Circle Turlock CA 95382 USA
4. School of Public Health Texas A&M University 212 Adriance Lab Road College Station TX 77843 USA
5. Department of Health and Kinesiology Texas A&M University 332C Blocker Building College Station TX 77843 USA
6. Center for Population Health and Aging Texas A&M University 212 Adriance Lab Road College Station TX 77843 USA