1. Department of Parks, Recreation and Tourism Management, College of Natural Resources and Center for Human Health and the Environment North Carolina State University Raleigh North Carolina USA
2. Brown School Washington University in St. Louis St. Louis Missouri USA
3. Division of Public Health Sciences Washington University School of Medicine St. Louis Missouri USA
4. Prevention Research Center in St. Louis Washington University in St. Louis St. Louis Missouri USA
5. Division of Public Health Sciences and Alvin J. Siteman Cancer Center Washington University School of Medicine St. Louis Missouri USA
6. Department of Epidemiology Center for Public Health Medical University of Vienna