Salivary gland carcinoma: independent prognostic factors for locoregional control, distant metastases, and overall survival: results of the Dutch head and neck oncology cooperative group - Terhaard, C H; Lubsen, H; Van dT, I; Hilgers, F J; Eijkenboom, W M; Marres, H A; Tjho-Heslinga, R E; de Jong, J M; Roodenburg, J L (Head Neck, 2004)