RT Journal Article SR Electronic T1 Risk factors for deterioration in mild COVID-19 remain undefined JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 406 OP 406 DO 10.1136/emermed-2021-211233 VO 38 IS 5 A1 Wood, Felix A1 Roe, Thomas A1 Newman, Jason A1 Wood, Leo YR 2021 UL http://emj.bmj.com/content/38/5/406.abstract AB