“…Content validity was assessed by presentation to experts [ 52 , 53 , 54 ]. For construct validity, exploratory factor [ 7 , 35 , 55 , 56 , 57 ] and confirmatory factor analyses [ 35 , 44 , 54 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ] were used. Five factors have been identified for the BC-FQOoL scale in the CFA in several countries: Turkey [ 63 ], Singapore [ 60 ], Taiwan [ 62 ], Greece [ 57 ], Saudi Arabia [ 58 ], and Spain.…”