| Affiliation: | 1. Department of Transfusion Medicine, Sanquin Blood Supply, Amsterdam, the Netherlands;2. Department of Internal Medicine, Division of Gastroenterology, Maastricht University Medical Centre, Maastricht, the Netherlands;3. Department of Methodology and StatisticSchool for Public Health and Primary Care (CAPHRI), Maastricht University;4. Department of Clinical Epidemiology and Medical Technology Assessment;5. Department of ResearchSanquin Blood Supply;6. Department of Internal Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands;7. Department of Internal Medicine, Zuyderland Medical Center, Heerlen/Brunssum/Sittard, the Netherlands;8. Department of Internal Medicine, Division of Rheumatology |
