1. Department of Pathobiology, University of Pennsylvania, School of Veterinary Medicine, New Bolton Center, Kennett Square, PA
2. Department of Virology, Faculty of Veterinary Medicine, University of Sadat, El Beheira Governorate, Sadat City, Egypt
3. Pennsylvania Game Commission, Bureau of Wildlife Management, Harrisburg, PA
4. Northeast Wildlife Disease Cooperative, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA