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Nedelmann, M; Stolz, E; Gerriets, T; Baumgartner, R W; Malferrari, G; Seidel, G; Kaps, M (2009). Consensus recommendations for transcranial color-coded duplex sonography for the assessment of intracranial arteries in clinical trials on acute stroke. Stroke, 40(10):3238-3244.