title: History of the National Cancer Institute and the plant screening program.
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000627:therapeutic use; D004353:Drug Evaluation, Preclinical / Q000266:history; D006666:History of Medicine; D006801:Humans; D008396:Maryland; D009316:National Institutes of Health (U.S.) / Q000266:history*; D009369:Neoplasms / Q000188:drug therapy / Q000266:history*; D008517:Phytotherapy; D010946:Plants, Medicinal; D014481:United States
chemical_list: D000972:Antineoplastic Agents, Phytogenic