Professor Campbell has been Associate Professor of Zoological Medicine at Colorado State University College of Veterinary Medicine since 1996. Prior to that he was a veterinarian at Sea World of Florida from 1988 to 1996. Professor Campbell has over 30 years of experience in exotic animal medicine. His research interests focus on exotic animal cytology, hematology, and plasma biochemistry. He is the author of Exotic Animal Hematology and Cytology, 4th edition (2015), the definitive hematologic and cytologic reference for all veterinarians and researchers working with avian and exotic animals. Professor Campbell is also the co-author of Clinical Cases in Avian and Exotic Animal Hematology and Cytology (2010), a hands-on guide that takes the reader through nearly 100 clinical cases.