“…Of 27 studies, six (22%) were from China [6] , [7] , [8] , [9] , [10] , [11] ; five (19%) were from Italy [12] , [13] , [14] , [15] , [16] ; three from Spain [17] , [18] , [19] ; two each from Chile [20] , [21] , Turkey [22] , [23] and the United States of America [24] , [25] ; one each from Brazil [26] , France [27] , India [28] , Israel [29] , Mexico [30] , Panama [31] and Peru [32] . Fifteen were classified as high-income countries [24] , [25] , [27] , [29] , [31] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] and 12 as low and middle-income countries [22] , [23] , [26] , [28] , [30] , [32] , [6] , [7] , [8] , [9] , [10] , [11] . Sixteen studies had a retrospective cohort design [14] , [24] , [28] , [29] , [32] , [6] , [7] , [8] , …”