Stroke due to atrial fibrillation in a population-based stroke registry (Ludwigshafen Stroke Study) CHADS(2), CHA(2)DS(2)-VASc score, underuse of oral anticoagulation, and implications for preventive measures - Palm, Frederick; Kleemann, Thomas; Martins dos Santos, Michael; Urbanek, Christian; Buggle, Florian; Safer, Anton; Hennerici, Michael G.; Becher, Heiko; Zahn, Ralf; Grau, Armin J. (European journal of neurology, 2013)