https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0280-6
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0271-7
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0279-z
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0273-5
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0283-3
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0274-4
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0272-6
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0282-4
https://archpublichealth.biomedcentral.com/articles/10.1186/s13690-018-0278-0