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Effectiveness of prophylactic retropharyngeal lymph node irradiation in patients with locally advanced head and neck cancer

Nam P Nguyen*, Jacqueline Vock, Vincent Vinh-Hung, Fabio Almeida, Lars Ewell, Michael Betz, Siyoung Jang, Richard A Vo, Suresh Dutta, Juan Godinez, Ulf Karlsson and Alexander Chi

BMC Cancer 2012, 12:253  doi:10.1186/1471-2407-12-253