RT Journal Article SR Electronic T1 Maternal iron supplementation in pregnancy and asthma in the offspring: follow-up of a randomised trial in Finland JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1902335 DO 10.1183/13993003.02335-2019 A1 Seif O. Shaheen A1 Mika Gissler A1 Graham Devereux A1 Maijaliisa Erkkola A1 Tarja I. Kinnunen A1 Harry Mcardle A1 Aziz Sheikh A1 Elina Hemminki A1 Bright I. Nwaru YR 2020 UL http://erj.ersjournals.com/content/early/2020/02/06/13993003.02335-2019.abstract AB