title: After disappointments, Alzheimer's researchers seek out new paths: biomarkers and combination therapies may lead to disease-modifying treatments, experts say.
abstract: Developing a disease-modifying treatment for Alzheimer's disease has stymied researchers. A collaborative re-examination of premises that guided disappointing earlier trials is under way, with talk of new targets and combination therapies.
authors.forename: Susan
authors.initials: S
authors.lastname: Worley