IgA Nephropathy Patient Baseline Characteristics in the Sparsentan PROTECT Study - Barratt, Jonathan; Rovin, Brad; Wong, Muh Geot; Alpers, Charles E; Bieler, Stewart; He, Ping; Inrig, Jula; Komers, Radko; Heerspink, Hiddo J. L; Mercer, Alex; Noronha, Irene de Lourdes (Kidney international reports, 2023)