Clinical significance of occult cerebrospinal fluid involvement assessed by flow cytometry in non-Hodgkin's lymphoma patients at high risk of central nervous system disease in the rituximab era

Juan Manuel Sancho, Alberto Orfao, Sandra Quijano, Olga García, Carlos Panizo, Elena Pérez-Ceballos, Guillermo Deben, Antonio Salar, Eva González-Barca, Natalia Alonso, Jose Antonio García-Vela, Javier Capote, Francisco Javier Peñalver, Mariano Provencio, Jesús Arias, Josefa Plaza, Dolores Caballero, Marta Morado, Evarist Feliu, Josep Maria Ribera