MEG localization of interictal epileptic focal activity and concomitant stereotactic radiosurgery. A non-invasive approach for patients with focal epilepsy. - Hellstrand,E.; Abraham-Fuchs,K.; Jernberg,B.; Kihlstrom,L.; Knutsson,E.; Lindquist,C.; Schneider,S.; Wirth,A. (Physiol Meas, 1993)