“…Articles gathered during the search described research conducted in many countries around the world. Six studies were carried out in Brazil [13,14,15,16,17,18] and four in the United States [19,20,21,22] . There was only one article from each of the following countries: Argentina [23] , Australia [24] , Canada [25] , England [26] , Italy [27] , Malawi [28] , Zambia [29] and United Kingdom [30] .…”