Multimodality Therapy Including Salvage Surgical Resection and Intraoperative Radiotherapy for Patients With Squamous-Cell Carcinoma of the Anus With Residual or Recurrent Disease After Primary ChemoradiotherapyChristopher L. Hallemeier, Michael G. Haddock, Heidi Nelson et al.|Diseases of the Colon & Rectum|2014Cited by 36