Department of Medical Oncology;
National Cancer Institute;
Cairo University;
Cairo;
Egypt;
Department of Radiation Oncology;
National Cancer Institute;
Cairo University;
Cairo;
Egypt;
Department of Clinical and Chemical Pathology;
National Cancer Institute;
Cairo University;
Cairo;
Egypt;
Head; and; Neck; Cancer; DPF; Docetaxel; Fluorouracil; Pharmacokinetics; Dose; Adjustment;