1. Leiden University Medical Center
2. Institute of Social & Preventive Medicine (ISPM); University Medical Centre
3. Cancer Research UK/NHS Centre for Statistics in Medicine
4. Nordic Cochrane Centre, Rigshospitalet
5. University of Texas Health Science Center
6. Medical Statistics Unit, London School of Hygiene and Tropical Medicine
7. University of North Carolina School of Public Health
8. University of Pittsburgh Graduate School of Public Health; University of Pittsburgh Cancer Institute
9. Institute of Social & Preventive Medicine (ISPM), University of Bern; University of Bristol