Institution: | 1. The Willows Veterinary Centre and Referral Service, , Solihull, West Midlands, B90 4NH;2. Hills Pet Nutrition UK, , Watford, Hertfordshire, WD18 8YL;3. Minnesota Urolith Center, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, , St Paul, MN, 55108 USA;4. The Royal Veterinary College, , North Mymms, Hatfield, AL9 7TA |