Application of z‐score‐based quantification of muscle echogenicity for the diagnosis of sarcopenia in patients with rheumatoid arthritis. Issue 12 (8th November 2022) - Yoshida, Takeshi; Kumon, Yoshitaka; Takamatsu, Naoko; Nozaki, Taiki; Inoue, Masataka; Albayda, Jemima; Izumi, Yuishin