“…Twenty-five articles were included. Of the total, eight studies were performed in European countries [ 8 , 20 , 23 , 26 , 30 , 31 , 40 , 41 ], seven in South and Central America Countries [ 7 , 9 , 21 , 33 , 34 , 35 , 43 ], three in African countries [ 32 , 37 , 39 ], three in Middle East countries [ 22 , 28 , 29 ], one in Asia [ 42 ], one in Oceania [ 25 ] and one in North America [ 24 ]. Moreover, studies were performed during different periods: two between 1985 and 1993 [ 20 , 24 ], four between 2004 and 2008 [ 37 , 39 , 41 , 42 ], and the others after 2010.…”