“…Most articles were published after 2013 (25: 71.4%). Four (24%) studies were conducted in India [ 42 , 44 , 55 , 58 ], Turkey [ 27 , 32 , 47 , 49 ] and Brazil [ 37 , 46 , 52 ], 3 (18%) in the USA [ 30 , 35 , 41 ], Spain [ 31 , 50 , 57 ], China [ 28 , 33 , 43 ], Korea [ 38 , 39 , 53 ], 2 (12%) in Italy [ 36 , 48 ], Finland [ 29 , 40 ] and other studies (6%) in Japan [ 54 ], Colombia [ 59 ], Iran [ 56 ], Taiwan [ 25 ], Austria [ 26 ] and Romania [ 45 ] (Tables 2 and 4 ).…”