https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0252-2
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0262-0
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0255-z
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0259-8
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0260-2
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0251-3
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0256-y
https://ehjournal.biomedcentral.com/articles/10.1186/s12940-017-0254-0