1. Center for the Human-Animal Bond, Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, IN, USA
2. Departments of Psychiatry and Pediatrics, School of Medicine, University of Colorado Anschutz Medical Campus, CO, USA
3. Center for the Interaction of Animals and Society, Department of Clinical Sciences & Advanced Medicine, University of Pennsylvania School of Veterinary Medicine, PA, USA
4. Center to Study Human-Animal Relationships and Environments, School of Public Health, University of Minnesota, MN, USA