“…A total of 37 studies matched the inclusion criteria and were included in this study ( 18 – 54 ). Twenty-two studies originated from North America ( 18 – 22 , 26 , 27 , 29 , 31 , 35 , 37 , 41 , 42 , 44 – 48 , 50 , 51 , 53 , 54 ), 11 studies from Asia ( 28 , 32 – 34 , 36 , 38 – 40 , 43 , 49 , 52 ), 3 studies from Australia ( 24 , 25 , 30 ) and 1 study from Europe ( 23 ). The included original articles were 7 randomized trials ( 19 – 22 , 26 , 27 , 33 ), 5 non-randomized trials ( 25 , 42 , 44 , 53 , 54 ), 4 retrospective ( 28 , 39 , 43 , 51 ) and 21 case-series ( 18 , 23 , 24 , 29 – 32 , 34 – 38 , 40 , 41 , 45 – 50 , 52 ).…”