In a multicenter study led by the University Hospital and the University Geriatric Medicine FELIX PLATTER Basel, a research group with participation from University of Basel, Inselspital, Bern University Hospital, the University of Bern and other centers, has investigated the equivalence of aspirin to anticoagulation. The study shows that aspirin is not as effective as blood thinning (anticoagulation) in the case of cervical artery dissection.