Quantification of Colour Doppler Activity in the Wrist in Patients with Rheumatoid Arthritis – the Reliability of Different Methods for Image Selection and Evaluation - Ellegaard, K; Torp-Pedersen, S; Lund, H; Henriksen, M; Terslev, L; Jensen, P S; Danneskiold-Samsøe, B; Bliddal, H (Ultraschall in der Medizin - European Journal of Ultrasound, 2008)