TY - GEN AU - Hill,Robert E TI - How to make a zone of polarizing activity: insights into limb development via the abnormality preaxial polydactyly SN - 0012-1592 PY - 2007///0927 KW - Animals KW - Body Patterning KW - physiology KW - Extremities KW - embryology KW - Gene Expression Regulation, Developmental KW - Hedgehog Proteins KW - Humans KW - Polydactyly N1 - Publication Type: Journal Article; Review UR - https://doi.org/10.1111/j.1440-169X.2007.00943.x ER -