Figure 2B. [doi:10.1182/blood-2007-08-107086] Lux CT; Yoshimoto M; McGrath K; Conway SJ; Palis J; Yoder MC, "All primitive and definitive hematopoietic progenitor cells emerging before E10 in the mouse embryo are products of the yolk sac." Blood 2008; 111: 3435-8. [PMID:17932251]