1 Department of clinical oncology, Northern Centre for Cancer Care, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE7 7DN, United KingdomShahid.iqbal@nhs.net.
2 Department of clinical oncology, Northern Centre for Cancer Care, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE7 7DN, United Kingdomc.navarrorodriguez@nhs.net.
3 Newcastle University, Newcastle upon Tyne, United Kingdoms.p.munro1@newcastle.ac.uk.
4 Department of geriatric medicine, Freeman Hospital, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE7 7DN, United KingdomBelgin.ozalp@nhs.net.
5 Department of clinical oncology, Northern Centre for Cancer Care, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE7 7DN, United KingdomCharles.kelly1@nhs.net.