Marta González-Vicent, Manuel Ramírez, Antonio Pérez, Alvaro Lassaletta, Julián Sevilla, Miguel Ángel Díaz. Extracorporeal photochemotherapy for steroid-refractory graft-versus-host disease in low-weight pediatric patients. Immunomodulatory effects and clinical outcome. Haematologica 2008;93(8):1278-1280; https://doi.org/10.3324/haematol.12688.