1. Internal Medicine Section, Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, 00014 Helsinki, Finland
2. Department of Nephrology, Helsinki University Hospital, University of Helsinki, 00290 Helsinki, Finland
3. Minerva Institute for Medical Research, 00220 Helsinki, Finland
4. IDEXX Laboratories, Inc., One IDEXX Drive, Westbrook, ME 04092, USA
5. Department of Clinical Sciences, Cummings School of Veterinary Medicine, Foster Hospital for Small Animals, Tufts University, North Grafton, MA 01536, USA