ImmunoDeficiency Resource (IDR)
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C4A deficiency
General Information
Clinical Information
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Printable factfile
Publications
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C4A deficiency
Societies
General:
International Patient Organization for Primary Immunodeficiencies
Immune Deficiency Foundation
March of Dimes Birth Defects Foundation
NIH/National Institute of Allergy and Infectious Diseases
European Society for Immunodeficiencies
Disease specific:
Lupus Foundation of America
Lupus Home Page
Other information sources
Printable factfile