Funding for this research was provided by:
national institute for health research (NIHR300246)
Received: 27 July 2021
Accepted: 27 September 2021
First Online: 7 October 2021
: This study has received ethical approval from a research ethics committee and the confidentiality advisory group (references 19/WA/0311, and 19/CAG/0209).
: As this is a retrospective study consent for publication was not possible
: Professor Richard Body has consulted for Siemens, Roche, Beckman, Singulex, LumiraDx and Abbott