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Dear Doctor Letter (Rote-Hand-Brief) on Tecfidera® (dimethyl fumarate): Suspected case of progressive multifocal leukoencephalopathy (PML)
2014.12.04
Active substance: dimethyl fumarate
The company Biogen Idec GmbH is circulating information on a fatal case of progressive multifocal leukoencephalopathy (PML) in a patient with a severe and long-term lymphopenia treated with Tecfidera®.
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