3913645 ECASS European Cooperative Acute Stroke Study 77 3913643 ECASS European-Australian Acute Stroke Study 3 3913644 ECASS European Cooperative Acute Stroke Radiological Study 1 3913648 ECASS European-Australasian Cooperative Acute Stroke Study 1 3913649 ECASS Evaluating a computer aid for assessing stomach symptoms 1