“…Thirty-two studies (40%) had a validated assessment of both PI and QOL [11,14,19,20,22,24,29,31,34,38,40,41,43,45,48,53,54,56,58,60,62,65,67,73,74,76,84,86,87,88,89,90]; in 33 (41%) and 3 (4%) of the studies, respectively, there was only a validated assessment of PI [8,10,13,17,21,23,25,26,28,30,33,35,36,42,44,47,49,50,52,59,61,63,69,71,77,78,80,81,82,83,85] or QOL [46,51,57]. …”