“…Twenty-one studies fulfilled the inclusion criteria (Table 1 , Ref. [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]). Seventeen were prospective, 3 were retrospective, and 1 cross-sectional.…”