Serine protease HTRA1 is a common autoantigen in membranous nephropathy in patients of 80 years and older. - Al-Rabadi LF; Storey AJ; Abuelsamen T; Takayama S; Walker PD; Nwaduru CE; Kawalit I; Zimmerman M; Hoxha E; Borza DB; Beck L Jr; Larsen CP; et al. (Kidney international, 2026)