Topotecan in the Treatment of Acquired Immunodeficiency Syndrome-Related Progressive Multifocal Leukoencephalopathy - W Royal III; B Dupont; D McGuire; L Chang; K Goodkin; T Ernst; MJ Post; D Fish; G Pailloux; H Poncelet; M Concha; L Apuzzo; et al. (Journal of NeuroVirology, 2003)