MR Imaging Presentation of Intracranial Disease Associated with Langerhans Cell Histiocytosis
AJNR 25:880-891, Prayer, D.,et al, 2004
Progressive Multifocal Leukoencephalopathy in Patients with AIDS:Appearance on MR Images
Radiology 173:517-529, Mark,A.S.&Atlas,S.W., 1989