Figure 3C. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(01)00656-6] Mech Dev 113: 79-83, Hajihosseini MK; Heath JK, Expression patterns of fibroblast growth factors-18 and -20 in mouse embryos is suggestive of novel roles in calvarial and limb development. Copyright 2002.