1. Department of Behavioral Science and Health Education, College for Public Health and Social Justice, Saint Louis University, St. Louis, MO, USA
2. Department of Management Science and Information Systems, University of Massachusetts, Boston, MA, USA
3. Center for Survey Research, University of Massachusetts, Boston, MA, USA
4. Parents as Teachers National Center, St. Louis, MO, USA
5. Carolinas Center for Injury Prevention, Department of Emergency Medicine, Carolinas Medical Center, Charlotte NC, USA