“…Following title screening, we included 314 records, which was reduced to 91 after abstract screening. After full‐text screening, 21 papers 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 were included. Two papers 29 , 30 were from one study, so the total number of included studies was 20.…”