JM Hernandez, G Martin, NC Gutierrez, J Cervera, MT Ferro, MJ Calasanz, JA Martinez-Climent, E Luno, M Tormo, C Rayon, J Diaz-Mediavilla, M Gonzalez, JD Gonzalez-San Miguel, K Perez-Equiza, C Rivas, J Esteve, C Alvarez Mdel, J Odriozola, JM Ribera, MA Sanz, PETHA Cooperative Group, Spain. Additional cytogenetic changes do not influence the outcome of patients with newly diagnosed acute promyelocytic leukemia treated with an ATRA plus anthracyclin based protocol. A report of the Spanish group PETHEMA. Haematologica 2001;86(8):807-813; https://doi.org/10.3324/%x.