1 Department of Clinical Oncology, Northern Centre for Cancer Care, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE7 7DN, United Kingdom. Electronic address: [email protected].
2 Department of Clinical Oncology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom.
3 Department of Medical Oncology, Northern Centre for Cancer Care, the Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.