1. Department of Microbiology & Immunology, Montana State University, Bozeman, MT, US
2. Statistical Consulting and Research Services, Montana State University, Bozeman, MT, US
3. Center for Asbestos Related Diseases, Libby, MT, US
4. Department of Biological Sciences, Idaho State University, Pocatello, ID, US
5. Cumming School of Medicine, University of Calgary, Calgary, Canada