1 Stroke Unit, Department of Neurology, Hospital Universitario Rey Juan Carlos, Instituto de Investigacion Sanitaria - Hospital Universitario Fundación Jiménez Díaz Universidad Autonóma de Madrid, Madrid, Spain.
2 Department of Neurology, Comprehensive Stroke, Massachusetts General Hospital Center, Harvard Medical School, Boston, MA, USA.
3 Department of Neurology, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
4 Institute of Cardiovascular and Medical Sciences, University of Glasgow, UK.