National Library of Medicine Pallister-Hall syndrome, its synonyms, a summary and a list of major features. http://www.nlm.nih.gov/mesh/jablonski/syndromes/syndrome521.html
Yahoo! Groups : Pallister-Hall Syndrome Details and instructions for joining, posting and reading the mail for this email support group. http://groups.yahoo.com/group/pallister-hall_syndrome/
NORD: Pallister Hall Syndrome Offers the synonyms, a general discussion and further resources. http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Pallister%20Hall%20Syndrome