National Library of Medicine: OS - Opitz syndrome, the synonyms, a summary and a list of major features. www.nlm.nih.gov/mesh/jablonski/syndromes/syndrome498.html
NORD - Opitz Syndrome - A look at the alternate names, a general discussion and resources. www.stepstn.com/cgi-win/nord.exe?proc=Redirect&type=rdb_sum&id=828.htm
Opitz G/BBB Family Network - Support network for family members whose children have Opitz-G/BBB syndrome. rkymtnhi.com/opitz
Zach's Opitz Syndrome Site - Offers information, a family's experience with this syndrome and links to the Opitz Family Network. home1.gte.net/res02evd/index.htm
