Risk factors for rare diseases can be risky to define: PML and natalizumab.
Eugene O
EO
Major
Daniel C
DC
Douek
D061067:Antibodies, Monoclonal, Humanized / Q000627:therapeutic use*; D006801:Humans; D019041:L-Selectin / Q000097:blood*; D007968:Leukoencephalopathy, Progressive Multifocal / Q000097:blood*; D009103:Multiple Sclerosis / Q000097:blood*; D000069442:Natalizumab
D061067:Antibodies, Monoclonal, Humanized; D000069442:Natalizumab; D019041:L-Selectin