1. Division of Pharmacoepidemiology and Clinical Pharmacology Utrecht University Utrecht The Netherlands
2. Department of Epidemiology RTI Health Solutions Barcelona Spain
3. Agenzia Regionale di Sanità della Toscana Florence Italy
4. Department of Genetics University Medical Centre Groningen Groningen The Netherlands
5. University Medical Centre Utrecht Utrecht The Netherlands
6. Department of Clinical Epidemiology Aarhus University and Aarhus University Hospital Aarhus Denmark
7. Base de datos para la Investigación Farmacoepidemiológica en Atención Primaria Agencia Española de Medicamentos y Productos Sanitarios Madrid Spain
8. Leibniz Institute for Prevention Research and Epidemiology Bremen Germany
9. Faculty of Human and Health Science University of Bremen Bremen Germany
10. Bordeaux PharmacoEpi INSERM CIC‐P 1401 Université de Bordeaux Bordeaux France
11. European Society for Blood & Marrow Transplantation Leiden The Netherlands
12. Department of Epidemiology Karolinska Institutet Stockholm Sweden
13. Foundation for the Promotion of Health and Biomedical Research of the Valencia Region Valencia Spain
14. Spanish Working Group on Crohn's Disease and Ulcerative Colitis Bilbao Spain
15. EpiChron Research Group Aragon Health Sciences Institute (IACS), IIS Aragón, Miguel Servet University Hospital Zaragoza Spain
16. Technical Advisory Subdirectorate of Information Management (STAGI) Andalusian Health Service (SAS) Seville Spain
17. London School of Hygiene and Tropical Medicine London UK
18. PHARMO Institute for Drug Outcomes Research Utrecht The Netherlands
19. Faculty of Pharmacy University of Ljubljana Ljubljana Slovenia
20. Institute of Genomics, University of Tartu Tartu Estonia
21. European Medicines Agency Amsterdam The Netherlands