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Taylor-Robinson DC, Pearce A, Whitehead M, Smyth R, Law C.Taylor-Robinson DC, et al. Among authors: whitehead m.Eur Respir J. 2016 Mar;47(3):818-28. doi: 10.1183/13993003.01117-2015. Epub 2015 Dec 17.Eur Respir J. 2016.PMID: 26677938Free PMC article.
Wickham S, Whitehead M, Taylor-Robinson D, Barr B.Wickham S, et al. Among authors: whitehead m.Lancet Public Health. 2017 Mar;2(3):e141-e148. doi: 10.1016/S2468-2667(17)30011-7. Epub 2017 Feb 16.Lancet Public Health. 2017.PMID: 29253387Free article.