“…Thirteen studies were conducted in Nordic countries: Denmark ( n = 4 [ 44 , 47 , 59 , 60 ]), Norway ( n = 3 [ 53 , 57 , 61 ]) and Sweden ( n = 6 [ 45 , 50 , 51 , 52 , 55 , 56 ]); nine studies were carried out in Belgium ( n = 2 [ 66 , 67 ]), France ( n = 1 [ 49 ]) and the UK ( n = 6 [ 46 , 48 , 54 , 58 , 64 , 65 ]); and two publications reported on one study performed in different European countries, namely Bosnia, Denmark, France, Greece, Norway, Poland, Spain and the UK [ 62 , 63 ].…”