Article History
Received: 6 June 2018
Accepted: 11 September 2018
First Online: 18 September 2018
Compliance with ethical standards
:
: The authors have no conflicts of interest to declare.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institution (Plymouth Hospitals NHS Trust R&D approval reference 15/P/073) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Due to the retrospective design of this radiological study and lack of study intervention, informed consent from the individual participants was deemed not required.