1. Technical University of Munich, Chair of Sport and Health Management, Department of Sport and Health Sciences, Munich, Germany
2. North Carolina State University, Department of Parks, Recreation & Tourism Management, College of Natural Resources, Raleigh, NC, USA
3. University of New Brunswick, Faculty of Kinesiology,Fredericton, Canada
4. Temple University, School of Sport, Tourism and Hospitality Management, Philadelphia, PA, USA
5. Johannes Gutenberg-Universität Mainz, Faculty of Social Science, Media and Sport, Mainz, Germany