Porphyria: The Unknown Disease - Genetic metabolic disorder. Overview of types, testing and diagnosis, and links. Porphyria - A look at the different types of these disease and some of their characteristics. EPP - Short for Erythropoetic ProtoPorhyria, which is a rare metabolic disease. A personal site about this disorder, one of the family of porphyrias. Acute Intermittent Porphyria Forum - Information and links about Porph. Includes registration form for an email list. Porphgroup - An e-mail group at Yahoo dealing with the metabolic disease porphyria. Porphyria - From Yahoo Groups. E-mail list for people with Porphyria. Friends, families and care givers are welcome. British Porphyria Association - UK support organisation for people with any of the seven variants of porphyria. King George III: Mad or misunderstood? - The BBC reports on whether King George III had porphyria. European Porphyria Network - The mission is to present an up to date approach to the understanding of porphyria.