RT Journal Article SR Electronic T1 Lung ultrasound in COVID-19 JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP e281 OP e282 DO 10.7861/clinmed.Let.20.6.7 VO 20 IS 6 A1 Avinash Aujayeb YR 2020 UL http://www.rcpjournals.org/content/20/6/e281.2.abstract