title: The missing element.
authors.forename: J A
authors.initials: JA
authors.lastname: Helpern
mesh_terms: D001921:Brain / Q000473:pathology; D002545:Brain Ischemia / Q000175:diagnosis* / Q000503:physiopathology; D004058:Diffusion; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging; D020521:Stroke / Q000175:diagnosis* / Q000503:physiopathology; D014022:Tissue Survival / Q000502:physiology