WITHDRAWN: Can depth of invasion of pT1 carcinoma of the oral tongue predict occult metastases in the neck? A retrospective study.

a Department of Oral & Maxillofacial Surgery, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, Oxford, UK b Department of Cellular Pathology, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, Oxford, UK c Division of Oral & Maxillofacial Surgery, Head and Neck Surgery Unit, Churchill Hospital, Oxford University Hospitals NHS Trust, Oxford, UK d Centre for Statistics in Medicine, University of Oxford, Oxford, UK