A phase II study of BAY 43-9006 in patients with recurrent and/or metastatic head and neck squamous cell carcinoma (HNSCC) and nasopharyngeal cancer (NPC) - Siu, L L; Winquist, E; Agulnik, M; Chin, S F; Pond, G R; Cheiken, R; Francis, P; Petrenciuc, O; Chen, E (J Clin Oncol, 2005)