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Respiratory Research > 2018 > 19 > 1 > 1-11
Clinical and Translational Allergy > 2016 > 6 > 1 > 1-10
Canadian Journal of Public Health > 2015 > 106 > 8 > e483-e488
European Journal of Epidemiology > 1999 > 15 > 8 > 747-755