1. University College Dublin; School of Medicine; Dublin Ireland
2. National University of Ireland Galway; Discipline of General Practice, School of Medicine; Galway Ireland
3. University College Dublin; Centre for Emergency Medical Science; Dublin Ireland
4. BC Centre for Excellence in HIV/AIDS; BC Centre on Substance Use; 611 Powell Street Vancouver BC Canada V6A 1H2
5. School of Medicine, University College Dublin; Health Science Centre, Belfield, UCD Dublin Ireland D4
6. University College Dublin; School of Public Health, Physiotherapy and Sport Science; Belfield Dublin Ireland 4
7. University College Dublin; UCD Centre for Support and Training in Analysis and Research (CSTAR); Dublin Ireland