Spectral iEEG markers precede SSEP events during surgery for subarachnoid hemorrhage - Wess, Christian; Sarnthein, Johannes; Krayenbühl, Niklaus; Scholz, Markus; Kunze, Ekkehard; Meixensberger, Jürgen (Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology, 2010)