hormonal and metabolic disorders
Erythropoietic Protoporphyria and X Linked Protoporphyria
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The following English-language resources may be useful. Please note that THE MANUAL is not responsible for the content of these resources. American Porphyria Foundation: Aims to educate and support patients and families affected by porphyrias TheUnited Porphyrias Association: Provides education and support to patients and their families; provides reliable information to health-care providers; fosters and supports clinical research to improve diagnosis and management of the porphyrias 