Figure 4A. Crackower MA; Scherer SW; Rommens JM; Hui CC; Poorkaj P; Soder S; Cobben JM; Hudgins L; Evans JP; Tsui LC, "Characterization of the split hand/split foot malformation locus SHFM1 at 7q21.3-q22.1 and analysis of a candidate gene for its expression during limb development." Hum Mol Genet 1996 May;5(5):571-9. [PMID:8733122]