“…The participants were assessed for their functional capacity and categorised according to Gross Motor Function Classification System (GMFCS). Six studies included participants with a GMFCS score of I-II [7,12,14,23,27,29] whereas nine authors categorised their participants under GMFCS score of I-III [13,15,16,[19][20][21][22]24,25,28,30]. However, nine studies did not use GMFCS for functional classification and categorisation of the studied sample population [4,6,11,17,18,31,32,34,35].…”