Figure 2H. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(02)00411-2] Mech Dev 120: 199-209, Tamura K; Amano T; Satoh T; Saito D; Yonei-Tamura S; Yajima H, Expression of rigf, a member of avian VEGF family, correlates with vascular patterning in the developing chick limb bud. Copyright 2003.