1. Radiotherapy Department, Cancer Centre of Trinidad and Tobago, St James, Trinidad and Tobago
2. University of the West Indies, St. Augustine, Trinidad & Tobago
3. Radiotherapy Physics, UCLH NHS Foundation Trust, London, UK
4. Metrology for Medical Physics National Physical Laboratory, Teddington, UK
5. Department of Medical Physics & Biomedical Engineering, University College London, London, UK