“…Seventeen studies were conducted in Australia [21–23, 25, 30, 32, 33, 38, 39, 51, 53, 56–59, 64, 65], fifteen in the UK [24, 31, 34, 35, 37, 40, 46, 47, 49, 52, 55, 60, 61, 63, 66], eight in the United States [26, 27, 36, 41, 43, 48, 54, 62], four in Canada [28, 29, 45, 50], and one each from Pakistan [42] and France [44]. The studies were published between 1999 [39] and 2014 [40, 48].…”