The power Doppler twinkling artefact associated with periarticular calcification induced by intra-articular corticosteroid injection in patients with rheumatoid arthritis. Issue 7 (16th March 2013) - Nagafuchi, Yasuo; Sumitomo, Shuji; Soroida, Yoko; Kanzaki, Takeyuki; Iwasaki, Yukiko; Michishita, Kazuya; Iwai, Tomomi; Ikeda, Hitoshi; Fujio, Keishi; Yamamoto, Kazuhiko