A dynamic prognostic model to predict survival in primary myelofibrosis: a study by the IWG-MRT (International Working Group for Myeloproliferative Neoplasms Research and Treatment) by Francesco Passamonti, Francisco Cervantes, Alessandro Maria Vannucchi, Enrica Morra, Elisa Rumi, Arturo Pereira, Paola Guglielmelli, Ester Pungolino, Marianna Caramella, Margherita Maffioli, Cristiana Pascutto, Mario Lazzarino, Mario Cazzola, and Ayalew Tefferi Blood Volume 115(9):1703-1708 March 4, 2010 ©2010 by American Society of Hematology Validation of the Cervantes et al score in 525 patients with primary myelofibrosis. Francesco Passamonti et al. Blood 2010;115:1703-1708 ©2010 by American Society of Hematology Cumulative incidence of acquisition of risk factors during follow-up, estimated with death as a competing risk in patients with primary myelofibrosis. Francesco Passamonti et al. Blood 2010;115:1703-1708 ©2010 by American Society of Hematology Kaplan-Meier estimate of survival in primary myelofibrosis according to the DIPSS. Risk categories were according to the score obtained anytime during follow-up. Francesco Passamonti et al. Blood 2010;115:1703-1708 ©2010 by American Society of Hematology Kaplan-Meier estimate of survival in primary myelofibrosis according to the aaDIPSS. Francesco Passamonti et al. Blood 2010;115:1703-1708 ©2010 by American Society of Hematology