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  • 1 Laboratory of Pathology, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348.
  • | 2 Section of Surgery, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348.
  • | 3 Section of Surgery, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348.