“…Three studies used the same cohort as in previous studies; 13,39,46 in subsequent studies the sample was stratified differently, 40 different measures were applied, 11 and additional validation data were reported. 45 Eight studies were conducted in continental Europe, 11,13,38,[43][44][45][46]53 and 14 were from the United Kingdom. 12,26,29,30,[32][33][34][35]37,[39][40][41]51,54 Seven studies were from Australia, 31,36,[48][49][50]52,55 three from the United States, 28,42,56 and one from Taiwan.…”