“…There were five (18%) studies that did not report the age of the included population [ 31 , 55 , 73 , 78 , 91 ]. Thirty-nine (68%) studies were restricted to pwCF who had a CFTR gating mutation [ 28 , 31 , 32 , 33 , 36 , 37 , 39 , 40 , 43 , 44 , 45 , 47 , 49 , 51 , 52 , 53 , 54 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 69 , 70 , 72 , 74 , 76 , 77 , 78 , 79 , 80 , 81 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 92 , 93 , 96 , 97 , 98 , 99 , …”