1. Department of Applied Social Sciences, Faculty of Health and Social Science, The Hong Kong Polytechnic University, Room HJ407, Core H, Hong Kong
2. Public Policy Research Institute, The Hong Kong Polytechnic University, Hong Kong
3. Department of Social Work, East China Normal University, Shanghai 200062, China
4. Kiang Wu Nursing College of Macau, Macau, China
5. Division of Adolescent Medicine, Department of Pediatrics, College of Medicine, Kentucky Children's Hospital, University of Kentucky, KY 40506, USA