1. Institute of Head and Neck Studies and Education, School of Cancer Sciences (H.M., T.A., N.C.), University of Birmingham, Birmingham B15 2TT, United Kingdom
2. Cancer Research Clinical Trials Unit, School of Cancer Sciences (B.C., E.M.), University of Birmingham, Birmingham B15 2TT, United Kingdom
3. University Hospitals Birmingham NHS Foundation Trust (J.W.), University of Birmingham, Birmingham B15 2TT, United Kingdom
4. School of Clinical and Experimental Medicine (C.M., K.B., J.A.F.), University of Birmingham, Birmingham B15 2TT, United Kingdom