- Prevalence of factor V Leiden mutation in young adults with cerebral ischaemia: a case-control study on 225 patients. Nabavi, D.G., Junker, R., Wolff, E., Lüdemann, P., Doherty, C., Evers, S., Droste, D.W., Kessler, C., Assmann, G., Ringelstein, E.B. J. Neurol. (1998)