Funding for this research was provided by:
Imperial College London
Received: 1 July 2020
Accepted: 24 November 2020
First Online: 11 December 2020
Compliance with ethical standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the principles of the1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Institutional ethical approval for retrospective analysis of human data was obtained and informed consent was waived, typical for retrospective analysis of anonymised imaging data. This article does not describe any studies performed on animals.
: The authors declare they have no conflict of interest.