“…Studies reported in peer-reviewed journals were mostly conducted in developed countries: the United Kingdom [36,41,43,45,47,54], the United States of America [34,44,52,53], Finland [46], Australia [40,49,51], Denmark [49][50][51]55], Norway [48] and Israel [37]. Two studies were conducted in developing countries: Brazil [42,52] and South Africa [35]. For studies published in books, all were conducted in developed countries: the United Kingdom [59,61,66,67], New Zealand [63,68], Norway [58,62], France [56], Switzerland [57], Australia [60], Denmark [64], Canada [65], the United States of America [69], Japan [39] and one unstated, possibly USA [38].…”