Article History
Received: 9 August 2019
Accepted: 14 October 2019
First Online: 29 October 2019
Compliance with ethical standards
:
: GH has received a lecturing fee from Amgen UK. All the other authors have no disclosures.
: The study was conducted as a service review in accordance with the institution research and development committee ethical standards and the UK data protection act.
: For this retrospective review, formal consent is not required.