https://equityhealthj.biomedcentral.com/articles/10.1186/s12939-016-0355-3
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https://equityhealthj.biomedcentral.com/articles/10.1186/s12939-016-0356-2
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https://equityhealthj.biomedcentral.com/articles/10.1186/s12939-016-0347-3
https://equityhealthj.biomedcentral.com/articles/10.1186/s12939-016-0354-4
https://equityhealthj.biomedcentral.com/articles/10.1186/s12939-016-0359-z