HEMATOPOIESIS AND STEM CELLS Vascular remodeling of the vitelline artery initiates extravascular emergence of hematopoietic clusters

1Department of Molecular, Cellular, and Developmental Biology, University of California at Los Angeles, Los Angeles, CA; 2Division of Neonatology, Department of Pediatrics, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, CA; 3Molecular Biology Institute, University of California at Los Angeles, Los Angeles, CA; 4Jonsson Comprehensive Cancer Center, University of California at Los Angeles, Los Angeles, CA; 5Division of Hematology-Oncology, Department of Medicine, and Department of Biologic Chemistry, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, CA; and 6Department of Pediatrics (Craniofacial Medicine), University of Washington, Seattle, WA