Lumbar interspinous bursitis in a patient with polymyalgia rheumatica/giant cell arteritis detected by musculoskeletal ultrasound: a case report. Issue 2 (24th November 2022) - Sagawa, Risa; Kida, Takashi; Inoue, Hironori; Hirano, Aiko; Kohno, Masataka; Kawahito, Yutaka