Carotti M, Filippucci E, Salaffi F. Power Doppler sonography and ultrasound contrast agent in assessing rheumatoid synovitis. Reumatismo [Internet]. 2002 Dec. 30 [cited 2024 Apr. 26];54(4):361-3. Available from: https://www.reumatismo.org/reuma/article/view/reumatismo.2002.361