Reply to C. Zhuang et al

Affiliations

• ¹ St Mark's Hospital, Harrow; and Imperial College, London, United Kingdom robin.kennedy@nhs.net.
• ² University of Oxford, Oxford, United Kingdom.
• ³ Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom.
• ⁴ Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, United Kingdom.
• ⁵ United Kingdom Centre for Surgical Research; and University of Bristol and University Hospitals Bristol, National Health Service Foundation Trust, Bristol, United Kingdom.