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Semiquantitative ultrasound score in B-mode at the wrist joint in the central dorsal longitudinal position (A) and color Doppler semiquantitative ultrasound at the metacarpophalangeal (MCP) joints in the dorsal longitudinal position (B). Cut off for positive musculoskeletal ultrasound finding was grade one in both B-mode and color Doppler ultrasound in this study.
