“…The population’s race was reported in four studies [ 28 , 30 , 34 , 38 ], with the reported groups being White, Black, Dark, African American, Native American, Asian, Hispanic and other race/ethnicities. Education level was reported in six studies, with this being school level (primary – university) in four studies [ 29 , 33 , 36 , 39 ]. In exploring education, different parameters were used.…”