1. Tourism, Hospitality and Event Management, Department of Recreation, Park and Tourism Studies, Indiana University, Bloomington, USA
2. Department of Economic Development, Tourism, and Sport Management, The University of Southern Mississippi, Hattiesburg, USA
3. University of Stavanger, Stavanger, Norway
4. Department of Health Sciences, Lehman College-The City University of New York, Bronx, USA
5. Department of Forestry, National Chung Hsing University, South District, Taiwan