Ultrasonographic Features of Focal Cortical Dysplasia and Their Relevance for the Surgical Treatment of Epilepsy - Akeret, K.; Bellut, D.; Huppertz, H.; Serra, C.; König, K.; Ramantani, G.; Regli, L.; Krayenbühl, N. (Journal of Neurological Surgery Part A: Central European Neurosurgery, 2018)