“…In the public health research literature, the terms "knowledge", "awareness", "belief", "representation", "public perception", or "attitude" are sometimes juxtaposed. In this systematic review, twelve articles focused on "awareness" [20,26,28,31,33,40,41,43,44,46,47,49], eight on "knowledge" [21,22,25,27,30,36,37,39], six on Question for cohort study assessment: Q1 = "Did the study address a clearly focused issue? "; Q2 = "Was the cohort recruited in an acceptable way?…”