1Arnett FC, Edworthy SM, Bloch DA, et al. The American Rheumatism Association 1987 revised criteria for the classification of rheumatoid arthritis. Arthritis Rheum, 1988, 31(3) :315-324.
2Schmidt WA, Schmidt H, Schicke B, et al. Standard reference values for musculoskeletal ultrasonography. Ann Rheum Dis, 2004, 63(8) :988-994.
3Walther M, Harms H, Krenn V, et al. Correlation of power Doppler sonography with vaseulatity of synovial tissue of the knee joint in patients with osteoarthritis and rheumatoid arthritis. Arthritis Rheum, 2001, 44 (2) :331-338.
4Terslev L, Torp-Pedersen S, Savnik A, et al. Doppler ultrasound and magnetic resonance imaging of synovial inflammation of the hand in rheumatiod arthritis: a comparative study. Arthritis Rheum, 2003, 48 (9):2434-2441.
5Klauser A, Frauscher F, Schirrner M, et al. The value of contrast - enhanced color Doppler ultrasound in the detection of vascularization of finger joints in patients with rheumatoid arthritis. Arthritis Rheum, 2002, 46(3) :647-653.
