1 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK. Electronic address: mandy.perry@nhs.net.
2 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK. Electronic address: john.oconnor1@nhs.net.
3 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK. Electronic address: alan.james1@nhs.net.
4 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK. Electronic address: adrian.cudmore@nhs.net.
5 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK. Electronic address: aled.lewis@nhs.net.
6 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK. Electronic address: maurice.salzmann@nhs.net.
7 Department of Blood Sciences, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 5DW, UK; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX4 4SB, UK. Electronic address: timothy.mcdonald@nhs.net.