Funding for this research was provided by:
Received: 13 December 2019
Accepted: 8 July 2020
First Online: 3 August 2020
Ethics approval and consent to participate
: This study was assessed as low risk by the Ethics Sub-committee in the Faculty of Medical Sciences, Newcastle University, given it used secondary anonymized area level data whereby it was not possible to identify patients. In view of this, the ethics Sub-committee in the Faculty of Medical Sciences granted ethical approval of the project without the need for a full ethical review (ref 4079/2020).
: Not applicable.
: None to declare.