“…The clarity of reporting was mixed on the PPIE definition used (n = 22) [ 13 , 18 , 20 , 22 , 37 – 39 , 41 , 43 , 45 , 47 , 48 , 50 , 51 , 53 , 58 , 60 – 63 , 66 , 67 ], the impact of PPIE (n = 28) [ 13 , 14 , 18 – 22 , 35 , 36 , 38 – 41 , 43 – 46 , 49 , 52 , 54 , 55 , 60 – 66 ], contextual and process factors affecting PPIE (n = 26) [ 13 , 18 , 19 , 21 , 22 , 35 – 39 , 41 , 43 , 45 , 46 , 50 – 55 , 60 – 63 , 66 , 67 ] and critical learning from the PPIE (n = 27) [ 13 ,…”