https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0296-3 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0300-y https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0304-7 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0299-0 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0294-5 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0301-x https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0297-2 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0285-6 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0292-7 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0295-4 https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0293-6