1. Small Animal Clinic (Internal Medicine); Justus-Liebig University Giessen; Giessen Germany
2. Department of Clinical Veterinary Medicine; Vetsuisse Faculty University of Bern; Bern Switzerland
3. IDEXX Biotechnology Group; IDEXX Laboratories, Inc.; Westbrook ME USA
4. Department of Veterinary Clinical Sciences; College of Veterinary Medicine; Purdue University; West Lafayette IN USA