Visualization of the basilar artery by transcranial color-coded duplex sonography: comparison with postmortem results. - Schulte-Altedorneburg,G.; Droste,D.W.; Popa,V.; Wohlgemuth,W.A.; Kellermann,M.; Nabavi,D.G.; Csiba,L.; Ringelstein,E.B. (Stroke, 2000)