Erratum: "Expanded and highly active proliferation centers identify a histological subtype of chronic lymphocytic leukemia ("accelerated" chronic lymphocytic leukemia) with aggressive clinical behavior" by Eva Gine', Antonio Martinez, Neus Villamor, Armando Lopez-Guillermo, Mireia Camos, Daniel Martinez, Jordi Esteve, Xavier Calvo, Ana Muntañola, Pau Abrisqueta, Maria Rozman, Ciril Rozman, Francesc Bosch, Elias Campo, and Emili Montserrat. Haematologica. 2010 Apr 7. [Epub ahead of print] with doi:10.3324/haematol. 2009.022277.