21



22



23
enthalten in: The lancet | 15 February 2013



24



25
enthalten in: The New England journal of medicine | December 15, 2011



26
enthalten in: The New England journal of medicine | October 27, 2011



27
enthalten in: The New England journal of medicine | January 29, 2009



28
enthalten in: Haematologica | 2004



29
enthalten in: The lancet | 29 February 2000



30
enthalten in: Stroke | 1 October 1999