What is the role of laboratory testing in the diagnosis of systemic lupus erythematosus?: update
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An initial urinalysis, complete blood count with differential and platelet count, and antinuclear antibody (ANA) are appropriate for evaluating patients suspected of having systemic lupus erythematosus (SLE). Further testing should be based on initial laboratory findings and clinical features. (SOR C, based on a consensus panel guideline.)
Evidence Based Practice 12(7): 12-13.