Utility of Columbia classification in focal segmental glomerulosclerosis: Renal prognosis and treatment response among the pathological variants

akihiro tsuchimoto, Yuta Matsukuma, Kenji Ueki, Shigeru Tanaka, Kosuke Masutani, Kaneyasu Nakagawa, Koji Mitsuiki, Noriko Uesugi, Ritsuko Katafuch, Kazuhiko Tsuruya, Toshiaki Nakano, Takanari Kitazono