1 Office of Research and Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, United States.
2 AnimalConcepts, Teulada, Alicante, Spain.
3 Department of Psychology, University of Stirling, Stirling, United Kingdom.
4 Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States.