1. Department of Small Animal Medicine (Platt), College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602-7390
2. Veterinary Internal Medicine and Critical Care Referrals (McGrotty), Broadleys Veterinary Hospital, Craig Leith Road, Broadleys, Stirling, FK7 7LE, Scotland; the
3. Department of Veterinary Clinical Sciences (Abramson), Veterinary Hospital, The Ohio State University, 601 Vernon L. Tharp Street, Columbus, Ohio 43210; and the
4. Departments of Clinical Chemistry and Pediatrics (Jakobs), Vrije Universiteit Medical Centre, De Boelelaan 1117 1081 HV, Amsterdam, The Netherlands
5. From the