Received: 1 March 2020
Accepted: 11 May 2020
First Online: 29 May 2020
Ethics approval and consent to participate
: Endorsement code for audit is 2017.98 issued by the Hull University Teaching Hospitals NHST approved the 1st June 2017. The study was performed in accordance with the data Protection Act (1998), the Caldicott principles (1997) and the NHS Confidentiality code of practice (2003) that all comply with the requirements of the declaration of Helsinki.
: FH, IM, WI and GB have no conflicts of interest in relation to this work.AM has received fees for speaker’s bureau, consultancy and travel from Pfizer (Dalteparin).