“…Thirty-two studies were single site studies [ 19 , 20 , 32 – 41 , 43 – 62 ]. The countries of origin were Turkey ( n = 8) [ 33 , 34 , 37 – 39 , 42 , 45 , 48 ], United States ( n = 3) [ 41 , 43 , 49 ], United Kingdom ( n = 3) [ 44 , 50 , 51 ], Australia ( n = 3) [ 19 , 20 , 57 ], China ( n = 3) [ 35 , 60 , 62 ], Italy ( n = 2) [ 58 , 61 ], Indonesia ( n = 2) [ 46 , 47 ] and one study each from Finland [ 32 ], Demark [ 54 ], Norway [ 36 ], Netherlands [ 40 ]. Switzerland [ 55 ], Brazil [ 52 ], Singapore [ 53 ], Taiwan [ 59 ], and Korea [ 56 ].…”