[1] Tufts Med Ctr, Div Cardiol, Boston, MA 02111 USA
[2] Tufts Univ, Sch Med, Dept Neurol, Tufts Med Ctr, Boston, MA 02111 USA
[3] Tufts Univ, Sch Med, Predict Analyt & Comparat Effectiveness Ctr, Inst Clin Res & Hlth Policy Studies,Tufts Med Ctr, Boston, MA 02111 USA
[4] Univ Duisburg Essen, Dept Neurol, Essen, Germany
[5] Columbia Univ, Div Cardiol, New York, NY USA
[6] Columbia Univ, Dept Neurol, New York, NY USA
[7] Columbia Univ, Dept Epidemiol, New York, NY USA
[8] Paris Descartes Univ, Dept Neurol, Hop St Anne, Paris, France
[9] Univ Bern, Inselspital, Dept Neurol, CH-3010 Bern, Switzerland
[10] Univ Bern, Inselspital, Dept Cardiol, Swiss Cardiovasc Ctr, CH-3010 Bern, Switzerland
[11] Triemli Municipal Hosp, Dept Neurol, Zurich, Switzerland
[12] Univ Roma La Sapienza, Dept Cardiol, I-00185 Rome, Italy
[13] Univ Cambridge, Dept Publ Hlth & Primary Care, Cambridge, England
[14] Univ Washington, Cardiol Clin, Seattle, WA 98195 USA
[15] Hosp Univ Doctor Josep Trueta, Inst Invest Biomed Girona, Dept Neurol, Girona, Spain