“…Most studies included in this review were conducted in developed countries. Fourteen of the included studies were conducted in the United States [ 15 , 16 , 18 , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , 42 ]. Three were conducted in Australia [ 17 , 30 , 31 ], two were carried out in Canada [ 32 , 38 ], two in South Korea [ 34 , 43 ], one in Taiwan [ 42 ], and one in Sweden [ 35 ].…”