1. From Department of Statistics and Operations Research (E.C., F.M., J.A.G., C.C., R.R.), Technical University of Catalonia, Barcelona, Spain; Medical Department (J.J.S.), Ferrer International, Barcelona, Spain; Stroke Center and Department of Neurology (J.L.S.), David Geffen School of Medicine at the University of California, Los Angeles, Calif; Department of Neurosciences (A.D.), Hospital Germans Trias i Pujol, Badalona, Spain.