Below is a working bibliography of trusted health, pharmacovigilance, and legal-analysis sources, compiled for open research.
Is Progressive Multifocal Leukoencephalopathy from Tysabri permanent? — Background & Analysis — detailed background and analysis.
Reference: Centers for Disease Control and Prevention (CDC)
Authoritative source for clinical, regulatory, and public-health background reading.
Reference: PubMed Central (PMC)
Authoritative source for clinical, regulatory, and public-health background reading.
Reference: MedlinePlus — Trusted Health Information
Authoritative source for clinical, regulatory, and public-health background reading.