1 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Department of Disease Control and Epidemiology, National Veterinary Institute, Uppsala SE 75 189, Sweden. Electronic address: fernanda.dorea@sva.se.
2 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; UMR IHAP, Université de Toulouse, INRAE, ENVT, Toulouse, France.
3 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Animal Health Ireland, Carrick-on-Shannon N41 WN27, Ireland.
4 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Norwegian Veterinary Institute, Ås, Norway.
5 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Department of Population Health Sciences, Unit Farm Animal Health, Utrecht University, Utrecht, the Netherlands.
6 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Section: Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Ireland.
7 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Veterinary Epidemiology, Economics and Public Health Group, Royal Veterinary College, London, United Kingdom.
8 The Society for Veterinary Epidemiology and Preventive Medicine, United Kingdom; Harper & Keele Veterinary School, Harper Adams University Campus, Newport, Shropshire TF10 8NB, United Kingdom.