1. Sydney School of Veterinary Science, University of Sydney, Regimental Dr., Camperdown NSW 2050, Australia
2. Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy
3. Department of Agriculture, Food and Environment, University of Pisa, 56124 Pisa, Italy
4. Sydney School of Veterinary Science, University of Sydney, Regimental Dr., Camperdown NSW 2050, Australia; and Equine Medicine Specialist, Goulburn Valley Equine Hospital, 905B Goulburn Valley Hwy., Congupna VIC 3633, Australia
5. Sydney School of Veterinary Science, University of Sydney, Regimental Dr., Camperdown NSW 2050, Australia; and Equine Surgery Specialist, Goulburn Valley Equine Hospital, 905B Goulburn Valley Hwy., Congupna VIC 3633, Australia