1. Centre for Veterinary Epidemiology and Risk Analysis; University College Dublin; Belfield Dublin 4 Ireland
2. UCD School of Veterinary Medicine; University College Dublin; Belfield Dublin 4 Ireland
3. Forenaghts Stud; Naas Co Kildare Ireland
4. Newmarket Equine Hospital; Suffolk UK
5. Lyons Research Farm; University College Dublin; Newcastle Co. Dublin Ireland