CRP and systemic lupus erythematosus: A complete blood count, antinuclear antibody (ANA), anti-double stranded DNA (dsDNA), and extractable nuclear antigen (ENA) panel was quantified along with erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), complement levels, creatinine, and glomerular filtration rate, ruling out systemic lupus erythematosus (SLE).