title: Challenges for clinical trials on progressive multifocal leukoencephalopathy.
authors.affiliation: Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63110, USA. cliffordd@neuro.wustl.edu
authors.forename: D B
authors.initials: DB
authors.lastname: Clifford
mesh_terms: D000998:Antiviral Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D006801:Humans; D007968:Leukoencephalopathy, Progressive Multifocal / Q000188:drug therapy*
chemical_list: D000998:Antiviral Agents