RT Journal Article SR Electronic T1 Six families with van der Woude and/or popliteal pterygium syndrome: all with a mutation in the IRF6 gene JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP e15 OP e15 DO 10.1136/jmg.2003.009274 VO 41 IS 2 A1 M Ghassibé A1 N Revencu A1 B Bayet A1 Y Gillerot A1 R Vanwijck A1 C Verellen-Dumoulin A1 M Vikkula YR 2004 UL http://jmg.bmj.com/content/41/2/e15.abstract AB