Margin Sampling and Survival Outcomes in Oral Cavity and p16-Positive Oropharyngeal Squamous Cell Carcinoma oleh Colin MacKay MSc, Brooke Turner MD, Martin Bullock MD, FRCPC, S. Mark Taylor MD, FRCSC, Jonathan Trites MD, FRCSC, Martin Corsten MD, FRCSC, Laurette Geldenhuys MBBCH, FFPATH, MMED, Matthew H. Rigby MD, MPH, FRCSC