1. Violence and Society Research Group, School of Dentistry; Cardiff University; Cardiff UK
2. Department of Public Health, College of Health Sciences; Qatar University; Doha Qatar
3. South East Wales Trials Unit, Centre for Trials Research; Cardiff University; Cardiff UK
4. MRC/CSO Social and Public Health Sciences Unit; University of Glasgow; Glasgow UK
5. DECIPHer, Cardiff School of Social Sciences; Cardiff University; Cardiff UK