Progressively transformed germinal centers: Experience in a tertiary center Irene Rojas Butrón; Helena Martínez Sánchez; Raquel Sánchez Vañó; Margarita Llavador Ros; Mara Andrés Moreno;

Spinal cord compression syndrome in pediatric oncology: review of a series of cases in a tertiary level center Helena Martínez Sánchez; Julia Balaguer Guill; Roberto Velasco Zúñiga;