Multiparametric flow cytometry directing the evaluation of CRLF2 rearrangements and JAK2 status in pediatric B cell precursor acute lymphoblastic leukemia Elda Pereira Noronha; Priscilla Moniz Sodré Ferreira; Francianne Gomes Andrade; Caroline Barbieri Blunck; Ricardo Camargo; Etel Rodrigues Pereira Gimba; Maria S. Pombo-de-Oliveira; Eugênia Terra-Granado;