A simple case of Henoch-Schönlein nephritis?

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1

Which serological examination do you not recommend for differential diagnosis of vasculitis?

	1. myoglobin
	2. antineutrophil cytoplasmic autoantibodies (ANCA)
	3. ds-DNA-antibody
	4. hepatitis B and C (HCV, HBV) and human immunodeficiency virus (HIV)