“…Of the 47 studies, 34 (72 %) were conducted in USA , two each in Switzerland (4 %) [51,52], Canada (4 %) [15,53], Ireland (4 %) [14,16] and Australia (4 %) [13,54], and one each in Denmark (2 %) [12], Italy (2 %) [55], Spain (2 %) [56], Sweden (2 %) [57] and the UK (2 %) [11].…”