RT Journal Article SR Electronic T1 Observational study of inhaled corticosteroid treatment for improved expiratory variability index in steroid-naive asthmatic children JF ERJ Open Research JO erjor FD European Respiratory Society SP 00499-2021 DO 10.1183/23120541.00499-2021 A1 Janne Burman A1 Pekka Malmberg A1 Ville-Pekka Seppä A1 Tuomas Jartti A1 Sami Remes A1 Ove Mickelsson A1 Anna S. Pelkonen A1 Mika J Mäkelä YR 2021 UL http://openres.ersjournals.com/content/early/2021/11/11/23120541.00499-2021.abstract AB