[1] Univ Oxford, Nuffield Dept Populat Hlth, Oxford OX1 2JD, England
[2] Univ Oxford, Stroke Prevent Res Unit, Oxford OX1 2JD, England
[3] Univ Cambridge, Dept Publ Hlth & Primary Care, Cambridge CB2 1TN, England
[4] AUT Univ, Natl Inst Stroke & Appl Neurosci, Auckland, New Zealand
[5] Univ Auckland, Dept Psychol, Auckland 1, New Zealand
[6] Danube Univ, Dept Clin Med & Prevent Med, Krems, Austria
[7] UCL, Fac Populat Hlth Sci, London WC1E 6BT, England
[8] Univ London, Blizard Inst, Ctr Primary Care & Publ Hlth, London WC1E 7HU, England
[9] Univ Calgary, Dept Clin Neurosci, Calgary, AB T2N 1N4, Canada
[10] Univ Calgary, Hotchkiss Brain Inst, Calgary, AB T2N 1N4, Canada
[11] Univ Calgary, Dept Community Hlth Sci, Calgary, AB T2N 1N4, Canada
[12] Univ Calgary, OBrien Inst Publ Hlth, Calgary, AB T2N 1N4, Canada
[13] Helmholtz Ctr Infect Res, Res Grp Epidemiol & Stat Methods, Braunschweig, Germany
[14] Georgetown Univ, Washington, DC USA
[15] Univ Desarrollo, Clin Alemana Santiago, Dept Med, Vasc Neurol & Stroke Unit,Neurol Serv, Santiago, Spain
[16] Univ Chile, Dept Neurol Sci, Inst Neurosurg, Santiago, Chile
[17] Univ Aldo Moro, Dept Basic Med Neurosci & Sense Organs, Neurodegenerat Dis Unit, Bari, Italy
[18] Fdn Card Pan, Dept Clin Res Neurol, Tricase, LE, Italy
[19] Univ Aldo Moro, Bari, Italy
[20] Univ Ulm, Inst Epidemiol & Med Biometry, D-89069 Ulm, Germany
[21] Univ Limoges, Inst Trop Neurol, F-87065 Limoges, France
[22] Univ Alberta, Sch Publ Hlth, Edmonton, AB, Canada