title: Author response.
authors: Daniel M
authors: DM
authors: Hartung
authors: Dennis N
authors: DN
authors: Bourdette
authors: Sharia
authors: S
authors: Ahmed
authors: Ruth H
authors: RH
authors: Whitham
mesh_terms: D003365:Costs and Cost Analysis; D004345:Drug Industry / Q000191:economics*; D006801:Humans; D007155:Immunologic Factors / Q000191:economics*; D007166:Immunosuppressive Agents / Q000191:economics*; D009103:Multiple Sclerosis / Q000188:drug therapy* / Q000191:economics*; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors* / Q000191:economics*
chemical_list: D007155:Immunologic Factors; D007166:Immunosuppressive Agents; D014409:Tumor Necrosis Factor-alpha