1. 1Centre for Medical Education, Cardiff University, School of Medicine College of Biomedical and Life Sciences, Glamorgan House, Heath Park, Cardiff CF14 4YS, UK 2University of the West Indies School of Clinical Medicine and Research, Shirley Street, Nassau, Bahamas
2. Centre for Medical Education, Cardiff University, School of Medicine College of Biomedical and Life Sciences, Glamorgan House, Heath Park, Cardiff CF14 4YS, UK
3. University of the West Indies School of Clinical Medicine and Research, Shirley Street, Nassau, Bahamas
4. Division of Infection and Immunity, Cardiff University, School of Medicine, College of Biomedical and Life Sciences, Heath Park, Cardiff, CF14 4XN, UK