Rapidly progressive glomerulonephritis in the elderly: a case of cryoglobulinemic glomerulopathy not to be overlooked - Hyeran Park; Seyoung Ryou; Seung Yun Chae; Eun Ah Kim; Jong-Mi Lee; Yaeni Kim; Yeong-Jin Choi; Cheol Whee Park (The Korean Society of Nephrology, 2024)