Bradley, J, O'Neill, B, Kent, L, Hulzebos, E H J, Arets, B & Hebestreit, H 2015, ' Physical activity assessment in cystic fibrosis: A position statement ', Journal of Cystic Fibrosis, vol. 14, no. 6, pp. e25-32 . https://doi.org/10.1016/j.jcf.2015.05.011, https://doi.org/10.1016/j.jcf.2015.05.011 Journal of Cystic Fibrosis, 14(6), e25. Elsevier