FLOW CYTOMETRY IS MORE SENSITIVE THAN CONVENTIONAL CYTOLOGY FOR THE IDENTIFICATION OF NEOPLASTIC INFILTRATION OF CEREBROSPINAL FLUID IN PATIENTS WITH AGGRESSIVE B-CELL NON-HODGKIN'S LYMPHOMA: RESULTS OF A PROSPECTIVE MULTICENTRIC STUDY - Quijano, S; Quijano, S; López, A; Sancho, JM; Panizo, C; Otero, PR; Deben, G; Castilla, C; Pérez-Ceballos, E; García-Vela, JA; Monteserín, MC; Salar, A; et al. (Haematologica, 2008)