africanamericans causeofdeath causes death deliveryofhealthcare discriminationinmedicalcare equality ethnicgroups ethnology europeancontinentalancestrygroup health healthandhygiene healthaspects healthbehavior healthservicesaccessibility healthstatus healthstatusindicators lifeexpectancy medicalcare medicaleconomics medicine minorities minoritygroups mortality qualityoflife research socialaspects socialclasses socialmedicine socioeconomicfactors statistics unitedstates work worldhealth