1. Department of Medicine and Epidemiology School of Veterinary Medicine University of California Davis California USA
2. Aquatic Animal Diseases Laboratory Aquaculture Department National Institute of Oceanography and Fisheries Suez Egypt
3. California Department of Fish and Wildlife Rancho Cordova California USA
4. National Center for Cool and Coldwater Aquaculture Kearneysville West Virginia USA
5. Comparative Pathology Laboratory School of Veterinary Medicine University of California Davis California USA
6. Department of Pathology College of Veterinary Medicine University of Georgia Athens Georgia USA