title: Stem cells unscramble yolk sac hematopoiesis.
abstract: Klimchenko and colleagues use human embryonic stem cells to define a novel bipotential hematopoietic progenitor that gives rise to primitive (yolk sac-type) erythrocytes and megakaryocytes.
authors.affiliation: The Children's Hospital of Philadelphia, USA.
authors.forename: Paul
authors.initials: P
authors.lastname: Gadue
authors.forename: Mitchell J
authors.initials: MJ
authors.lastname: Weiss