“…Out of the 36 articles that linked parameters to clinical outcomes (see criterion 5 of the Quality Assessment, Additional file 1 ), 14 found a moderate to excellent significant correlation [ 16 , 31 , 33 , 39 , 46 , 53 , 54 , 59 , 61 , 64 , 75 , 78 , 85 , 89 ]. Two main articles have extensively studied the correlations between clinical outcomes and biomarkers, where a biomarker is the association between a task and a parameter.…”