1. Elekta Limited Cornerstone London Road CrawleyRH10 9BLUnited Kingdom
2. Philips Healthcare Vantaa Finland
3. Allegheny Health Network Cancer Institute Pennsylvania USA
4. The Joint Department of Physics The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust UK
5. Department of Radiation Oncology The Netherlands Cancer Institute–Antoni van Leeuwenhoek Hospital Amsterdam the Netherlands
6. Memorial Sloan Kettering Cancer Center New York USA
7. Department of Radiation Physics The University of Texas MD Anderson Cancer Center Texas USA
8. Department of Radiotherapy University Medical Center Utrecht Utrecht the Netherlands
9. Odette Cancer Centre Sunnybrook Health Sciences Centre Toronto Ontario Canada
10. Christie Medical Physics and Engineering The Christie NHS Foundation Trust Wilmslow Road Manchester United Kingdom
11. Department of Radiation Oncology Froedtert Hospital and Medical College of Wisconsin Milwaukee USA