title: All limbs are not the same.
authors.forename: B
authors.initials: B
authors.lastname: Christen
authors.forename: J M
authors.initials: JM
authors.lastname: Slack
mesh_terms: D000818:Animals; D005075:Biological Evolution; D019521:Body Patterning; D005121:Extremities / Q000196:embryology*; D015870:Gene Expression; D015398:Signal Transduction; D014981:Xenopus