Acute stroke CDS: automatic retrieval of thrombolysis contraindications from unstructured clinical letters oleh Murray Cutforth, Hannah Watson, Cameron Brown, Chaoyang Wang, Stuart Thomson, Dickon Fell, Vismantas Dilys, Morag Scrimgeour, Patrick Schrempf, James Lesh, Keith Muir, Alexander Weir, Alison Q O’Neil, Alison Q O’Neil