CRP and vasculitis: Biochemical tests including blood count, liver function tests, kidney function tests, thyroid function tests and vitamin and mineral levels, as well as vasculitis screening (erythrocyte sedimentation rate (ESR), C‐reactive protein (CRP), antinuclear antibodies (ANA)), lupus anticoagulant (LA), anti‐cardiolipin antibodies (ACL Ab), SSA, SSB and antineutrophil cytoplasmic antibodies (ANCAs), showed no abnormalities.