AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineFloxuridineTrabeculectomySubstance PInosine MonophosphatePhosphoribosyl PyrophosphateFluorouracilMitomycin6-MercaptopurineMethotrexateLeukemia L1210Folic Acid AntagonistsCytarabinePurinesAntineoplastic AgentsDrug SynergismDrug Screening Assays, AntitumorDeoxycytidineDrug Evaluation, PreclinicalCell SurvivalSubstance-Related DisordersTumor Cells, CulturedNeoplasmsCell CycleCell DivisionCell LineKineticsReceptors, Neurokinin-1Substance Abuse Treatment Centers