When is chemotherapy in head and neck squamous cell carcinoma not indicated?

Missak Haigentz, Jan B Vermorken, Arlene A Forastiere, June Corry, Jonathan J Beitler, Primoz Strojan, Dana M Hartl, Juan P Rodrigo, Carol R Bradford, Alessandra Rinaldo, Robert P Takes, William M Mendenhall, Ashok R Shaha, Gregory T Wolf, Alfio Ferlito