“…A selective policy of IOC use was adopted in 14 studies with a mean IOC use of 16.7% (2.8%–36.9%) in 12,064 patients [ 18 , 19 , 34 , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] ]. Additionally, 14 studies adopted a policy of routine IOC with a mean average use of 88.3% (63.5%–99.2%) in 25,072 patients [ 17 , 19 , 34 , 37 , 42 , [48] , [49] , [50] , [51] , [52] , [53] , [54] , [55] , [56] ].…”