“…During the quality assessment, 69 studies were removed, while four papers were added after review of references. Finally, 40 studies 4 , 7 , 8 , 11 , 12 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 were determined eligible to enter into the meta-analysis ( Figure 1 ; Table 1 ).…”