title: Biologics--growing knowledge.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D004351:Drug Resistance; D006801:Humans; D007155:Immunologic Factors / Q000009:adverse effects*; D007239:Infections / Q000139:chemically induced; D009369:Neoplasms / Q000139:chemically induced; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors*
chemical_list: D007155:Immunologic Factors; D014409:Tumor Necrosis Factor-alpha