Received: 2 April 2020
Accepted: 27 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: This study was approved by local clinical governance commitees and conformed to the principles of Good Clinical Practice. This study utilized clinical data collected in the course of normal patient care (without intention to use it for research at time of collection) and thus does not require ethical approval, consistent with Health Regulation Authority guidance.
: Not applicable.
: The authors declare that they have no competing interests.