title: Introduction. The whole is not only more than but very different than the sum of its parts.
authors.affiliation: Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, USA. Electronic address: Oconnor@iastate.edu.
authors.forename: Annette
authors.initials: A
authors.lastname: O'Connor
mesh_terms: D000818:Animals; D001363:Awards and Prizes; D004813:Epidemiology / Q000266:history; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D012582:Schools, Veterinary / Q000266:history; D012958:Societies, Scientific; D014481:United States; D014730:Veterinary Medicine / Q000266:history