1. Department of Sport Science and Physical Education, University of Agder, Kristiansand, Norway
2. School of Allied Health & Community, University of Worcester, Worchester, Massachusetts, UK
3. Department of Sport and Social Sciences, Norwegian School of Sport Science, Oslo, Norway
4. School of Kinesiology and Health Studies, Queen’s University, Kingston, Canada
5. Department of Psychology, Umeå University, Umeå, Sweden