1. Veterinary Bioscience Institute, 292 Main Street, #300, Harleysville, PA 19438, USA;
2. Laboratory Animal Resources Center, The University of Texas at San Antonio, San Antonio, TX, USA;
3. Veterinary Services for Putney, Inc, Putney, Inc, 400 Congress Street, Portland, ME 04101, USA;
4. University Laboratory Animal Resources, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
5. Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA, USA