Increased expression of vascular endothelial growth factor receptor 1 correlates with VEGF and microvessel density in Philadelphia chromosome-negative myeloproliferative neoplasms
Pathology Unit, Department of Medicine, Surgery and Dentistry, University of Milan Medical School, A.O. San Paolo, and Fondazione IRCCS Ca' Granda-Ospedale Maggiore Policlinico, Via F. Sforza 35, Milan, Italy.