Preoperative mapping techniques for brain tumor surgery: a systematic review - Leone, Augusto; Carbone, Francesco; Spetzger, Uwe; Vajkoczy, Peter; Raffa, Giovanni; Angileri, Flavio; Germanó, Antonino; Engelhardt, Melina; Picht, Thomas; Colamaria, Antonio; Rosenstock, Tizian (Frontiers in Oncology, 2025)