title: C4d in IgA nephropathy: a marker sans boundaries.
authors.affiliation: Department of Histopathology, Sindh Institute of Urology and Transplantation (SIUT), Karachi, Pakistan.
authors.forename: Muhammed
authors.initials: M
authors.lastname: Mubarak
keywords: C4d; IgA nephropathy; Oxford classification system; Rapidly progressive glomerulonephritis