MPO and bacterial urinary tract infection: ANCA: anti-neutrophil cytoplasmic antibody; CMV: cytomegalovirus; CRBSI: catheter-related bloodstream infection; CY: cyclophosphamide; F: female; M: male; MPO: myeloperoxidase; mPSL: methylprednisolone; MRSE: methicillin-resistant Staphylococcus epidermidis; PR3: proteinase 3; PSL: prednisolone; UTI: urinary tract infection