Serologies obtained to evaluate for concurrent autoimmune disorder, hematological malignancy, or infections including ANA, anti-PR3, anti-TTG, anti-SMA, anti-centromere, anti-gliadin, anti-SSA/SSB, anti-RNP, anti-MPO, anti-dsDNA, c-ANCA and p-ANCA, SPEP/UPEP, HIV, viral hepatitis panel, serum IgG, and cryoglobulin levels were all negative or normal. Here, PRTN3 is linked to infection.