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Survival estimations comparing IgG anti-phosphatidylserine antibody (APSA)+ (○) and IgG APSA− (•) individuals. Individuals with severe immunodeficiency (CD4+ T lymphocytes < 0.2/nl) and positive APSA IgG tended to have a longer survival compared with subjects with severe immunodeficiency, but negative APSA IgG (P = 0.106, log-rank test).
