“…Twenty-six papers presented data collected in high income countries, namely Canada [ 40 , 42 , 44 , 45 , 64 , 65 , 67 ], USA [ 34 – 36 ], United Kingdom [ 48 , 62 ], Sweden [ 49 , 51 – 53 , 56 , 57 ], Australia [ 50 , 55 , 58 – 61 ], and Germany [ 63 ]. The remaining papers were conducted in middle-income countries, namely Jordan [ 37 , 41 , 46 ], Turkey [ 39 , 54 , 66 ], Lebanon [ 38 , 43 ], and Iran [ 47 ]. Seven papers did not specify country of origin of all participants other than ‘Middle East’ or ‘Maghreb’ [ 35 , 36 , 40 , 42 , 44 , 45 , 57 ].…”