“…The majority of studies ( n = 27) were published in or after 2014 [ 24 , 26 , 32 , 33 , 36 , 39 – 41 , 43 , 46 – 51 , 57 , 65 , 66 ], and none before 2006. Most ( n = 18) were conducted in the USA [ 25 , 36 , 39 , 40 , 42 , 44 , 45 , 51 – 55 , 57 – 60 , 64 , 65 ], seven in the Netherlands [ 32 , 41 , 49 , 50 , 61 , 62 , 66 ], four in Australia [ 27 , 28 , 46 , 47 ], three in Canada [ 24 , 35 , 43 ], two in Scotland [ 37 , 38 ], and one each in South Africa [ 48 ], UK [ 63 ], Greece [ 56 ] Denmark [ 33 ], and Switzerland [ 26 ]. Sample sizes ranged from 14 [ 60 ] to over 4500 participants [ 45 ], with sample sizes <300 in the majority of studies ( n = 28) [ 24 – 28 , 33 , 35 , 39 – 41 , 43 , 44 , 46 – 51 , 53 , 55 – 57 , 59 – 64 ].…”