1. Institute for Social Research, University of Michigan, Ann Arbor, Michigan, USA
2. The Methodology Center, The Pennsylvania State University, PennsylvaniaUSA
3. Prevention Research Center, The Pennsylvania State University, PennsylvaniaUSA
4. Department of Recreation, Park and Tourism Management, The Pennsylvania State University, PennsylvaniaUSA
5. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
6. Department of Occupational Therapy, University of the Western Cape, Cape Town, South Africa