“…Twenty‐eight studies reported on this step [ 20 , 23 , 24 , 26 , 27 , 28 , 31 , 33 , 34 , 35 , 37 , 38 , 39 , 41 , 44 , 45 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ]: 15 cohort studies, 10 cross‐sectional and three of mixed design. Twenty‐four studies (86%) provided a clear definition of the step (Table 2 ).…”