A Placebo-Controlled Exploratory Trial of Sirolimus for Tocilizumab-Resistant Idiopathic Multicentric Castleman Disease: Early Termination and Long-Term Extension Results Based on Descriptive Results From Two Patients. - Koga T; Sumiyoshi R; Shimizu T; Hosogaya N; Fukushima C; Yamamoto H; Yoshifuji H; Higa S; Kawakami A (Cureus, 2025)