Comment on

• Progressive multifocal leukoencephalopathy in a patient treated with natalizumab.

  Langer-Gould A, Atlas SW, Green AJ, Bollen AW, Pelletier D. Langer-Gould A, et al. N Engl J Med. 2005 Jul 28;353(4):375-81. doi: 10.1056/NEJMoa051847. Epub 2005 Jun 9. N Engl J Med. 2005. PMID: 15947078
• Progressive multifocal leukoencephalopathy complicating treatment with natalizumab and interferon beta-1a for multiple sclerosis.

  Kleinschmidt-DeMasters BK, Tyler KL. Kleinschmidt-DeMasters BK, et al. N Engl J Med. 2005 Jul 28;353(4):369-74. doi: 10.1056/NEJMoa051782. Epub 2005 Jun 9. N Engl J Med. 2005. PMID: 15947079
• Progressive multifocal leukoencephalopathy after natalizumab therapy for Crohn's disease.

  Van Assche G, Van Ranst M, Sciot R, Dubois B, Vermeire S, Noman M, Verbeeck J, Geboes K, Robberecht W, Rutgeerts P. Van Assche G, et al. N Engl J Med. 2005 Jul 28;353(4):362-8. doi: 10.1056/NEJMoa051586. Epub 2005 Jun 9. N Engl J Med. 2005. PMID: 15947080