1. Veterinary Epidemiology Unit; Department of Reproduction; Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
2. Department of Infectious Diseases & Immunology; Faculty of Veterinary Medicine; Utrecht University; Utrecht The Netherlands
3. Veterinary Clinic Tweestromenland; Wijchen The Netherlands
4. Center for Research and Innovation in Medical Education, University Medical Center; Groningen The Netherlands
5. Julius Center for Health Sciences and Primary Care, University Medical Center; Utrecht The Netherlands
6. Central Veterinary Institute (CVI) of Wageningen UR; Lelystad The Netherlands