Robert E. Schmidt, DVM, PhD, DACVP, is a consultant in veterinary pathology for veterinary diagnostic laboratories, zoological parks and aquariums, and veterinary practitioners specializing in diseases of birds, reptiles, fish, laboratory animals, and zoo animals, based in Anthem, Arizona, USA. Jason D. Struthers, DVM, MVetSc, DACVP, is an associate professor of veterinary pathology at Midwestern University's Animal Health Institute in Glendale, Arizona, USA.
David N. Phalen, DVM, PhD, is professor emeritus at the Sydney School of Veterinary Science, School of Life and Environmental Science in Sydney, NSW, Australia.