NORD: Pseudoxanthoma Elasticum
http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Pseudoxanthoma%20Elasticum%20%28P
Offers a general discussion and resources for PXE.
PXE International
The comprehensive source for pseudoxanthoma elasticum research and world wide activities.
VhiHealth-e
A definition of Pseudoxanthoma elasticum followed by a description, causes and symptoms, diagnosis, treatment options, prognosis and prevention.