Sabela Bobillo, Marta Crespo, Laura Escudero, Regina Mayor, Priyanka Raheja, Cecilia Carpio, Carlota Rubio-Perez, Bárbara Tazón-Vega, Carlos Palacio, Júlia Carabia, Isabel Jiménez, Juan C. Nieto, Julia Montoro, Francisco Martínez-Ricarte, Josep Castellvi, Marc Simó, Lluis Puigdefàbregas, Pau Abrisqueta, Francesc Bosch, Joan Seoane. Cell free circulating tumor DNA in cerebrospinal fluid detects and monitors central nervous system involvement of B-cell lymphomas. Haematologica 2021;106(2):513-521; https://doi.org/10.3324/haematol.2019.241208.