1. Agriculture, Forestry, and Fishing, The Northeast Center for Occupational Health and Safety, Cooperstown, NY, USA
2. Department of Agricultural & Biological Engineering, Penn State University, University Park, PA, USA
3. Southwest Center for Occupational and Environmental Health, Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health in San Antonio, the University of Texas Health Science Center at Houston, San Antonio, TX, USA
4. Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, Alnarp, Sweden
5. Extension Animal Sciences and Natural Resources Department, College of Consumer and Environmental Sciences, New Mexico State University, Dairy Extension, Clovis, NM, USA