This page collects vetted references on medical safety, regulatory guidance, and clinical background for anyone researching this topic.
Does Tysabri cause Progressive Multifocal Leukoencephalopathy — Background & Analysis
A focused look at the background, context, and key sources on this subject.
Reference: MedlinePlus — Trusted Health Information
Authoritative source for clinical, regulatory, and public-health background reading.
Reference: U.S. Food and Drug Administration (FDA)
Authoritative source for clinical, regulatory, and public-health background reading.
Reference: Wikipedia: Medical Malpractice
Authoritative source for clinical, regulatory, and public-health background reading.