RT Journal Article SR Electronic T1 Ventilation/perfusion mismatch is not the sole reason for hypoxaemia in early stage COVID-19 patients JF European Respiratory Review JO EUROPEAN RESPIRATORY REVIEW FD European Respiratory Society SP 210277 DO 10.1183/16000617.0277-2021 VO 31 IS 164 A1 Gurgen Harutyunyan A1 Varsenik Harutyunyan A1 Garnik Harutyunyan A1 Andrés Sánchez Gimeno A1 Artur Cherkezyan A1 Spartak Petrosyan A1 Anatoli Gnuni A1 Suren Soghomonyan YR 2022 UL http://err.ersjournals.com/content/31/164/210277.abstract AB