1. Departments of Microbiology, Causeway Hospital, Coleraine, Co. Londonderry
2. Departments of Respiratory Medicine, Causeway Hospital, Coleraine, Co. Londonderry
3. Northern Ireland Mycobacterium Reference Laboratory, Department of Medical Microbiology, Royal Group of Hospitals
4. Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital
5. Department of Microbiology, Antrim Area Hospital, Co. Antrim
6. School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, UK