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https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0028-5
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0026-7
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0033-8
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0036-5
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0030-y
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0027-6
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0025-8
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-015-0035-6