Belgrave , D C M , Granell , R , Turner , S W , Curtin , J A , Buchan , I E , le Souëf , P N , Henderson , A J & Custovic , A 2018 , ' Lung function trajectories from pre-school age to adulthood and their associations with early life factors : a retrospective analysis of three population-based birth cohort studies ' , The Lancet. Respiratory medicine , vol. 6 , no. 7 , pp. 526-534 . https://doi.org/10.1016/S2213-2600(18)30099-7