ERJ Open Research article-version (VoR) Version of Record ERJ Open Research, Vol 7, Iss 1 (2021) ERJ Open Research, European Respiratory Society, 2021, 7, pp.00014-2021. ⟨10.1183/23120541.00014-2021⟩ ERJ Open Research, 2021, 7, pp.00014-2021. ⟨10.1183/23120541.00014-2021⟩