Citations for

1	ECTD3, MSX1
	A nonsense mutation in MSX1 causes Witkop syndrome.
	Jumlongras D, Bei M, Stimson JM, Wang WF, DePalma SR, Seidman CE, Felbor U, Maas R, Seidman JG, Olsen BR.
	Am J Hum Genet. Jul;69(1):67-74. doi: 10.1086/321271. Epub 2001 May 16. 2001