Affiliation: | 1. Lingehoeve Diergeneeskunde, Lienden, The Netherlands;2. Quantitative Veterinary Epidemiology Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, Wageningen, The Netherlands;3. Equine Referral Centre Emmeloord, Emmeloord, The Netherlands;4. Department of Equine Health, Utrecht University, Utrecht, The Netherlands;5. Department of Animal Reproduction, University of Pretoria, Pretoria, South Africa |