“…From all the cross-sectional studies, only 4 studies 19 , 22 , 25 , 29 are considered as a close representation of the general population. Finally, analyzing the risk of bias of the prevalence studies included, the majority represent a moderate risk 17 , 24 , 29 – 31 , 33 , 35 – 43 , 45 , 47 , 48 , 50 – 51 , 53 – 66 , 68 , 70 – 73 , 76 – 84 , 86 , 89 , 92 – 100 (57); some are low risk 16 , 18 – 23 , 25 – 29 , 32 , 34 , 44 , 49 (16); no study represents a high risk ( Table 4 – Table 6 ).…”