G. Mastrangelo et al. “Lung and Other Cancer Site Mortality in a Cohort of Italian Cotton Mill Workers”. Occupational and Environmental Medicine 65, № 10 (2008); G. Mastrangelo, V. Marzia, G. Marcer, “Reduced Lung Cancer Mortality in Dairy Farmers: Is Endotoxin Exposure the Key Factor?” American Journal of Industrial Medicine 30, № 5 (1996).