Adenocarcinoma/drug therapy; Antineoplastic Combined Chemotherapy Protocols/pharmacokinetics; Antineoplastic Combined Chemotherapy Protocols/therapeutic use; Carcinoma, Large Cell/drug therapy; Carcinoma, Non-Small-Cell Lung/drug therapy; Carcinoma, Squamous Cell/drug therapy; Lung Neoplasms/drug therapy; Adenocarcinoma/secondary; Aged; Carcinoma, Large Cell/secondary; Carcinoma, Non-Small-Cell Lung/secondary; Carcinoma, Squamous Cell/secondary; Deoxycytidine/administration & dosage; Deoxycytidine/analogs & derivatives; Female; Follow-Up Studies; Humans; Lung Neoplasms/pathology; Lymphatic Metastasis; Male; Maximum Tolerated Dose; Middle Aged; Neoplasm Recurrence, Local/drug therapy; Neoplasm Recurrence, Local/pathology; Neoplasm Staging; Survival Rate; Tissue Distribution; Treatment Outcome; Vinblastine/administration & dosage; Vinblastine/analogs & derivatives; Gemcitabine