This article from the April 2015 issue of the European Respiratory Journal was published with an incomplete list of author affiliations. Montserrat Ferrer is affiliated with CIBER Epidemiología y Salud Pública (CIBERESP), Spain, in addition to the Health Services Research Unit, IMIM (Hospital del Mar Research Institute), Barcelona, Spain, and the Dept of Paediatrics, Obstetrics and Gynaecology and Preventative Medicine, Universitat Autónoma de Barcelona, Barcelona, Spain. The article has been corrected and republished online.
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