Cohen EE, Rosine D, Haraf DJ, Loh E, Shen L, Lusinchi A, Vokes EE, Bourhis J. Phase I trial of tirapazamine, cisplatin, and concurrent accelerated boost reirradiation in patients with recurrent head and neck cancer. Int J Radiat Oncol Biol Phys. 2007 Mar 01; 67(3):678-84.