SzkudlarekM.NarvestadE.KlarlundM.Ultrasonography of the metatarsophalangeal joints in rheumatoid arthritis: comparison with magnetic resonance imaging, conventional radiography, and clinical examinationArthritis Rheum2004; 50:2103–2112.
2.
KoskiJ.SaarakkalaS.HelleM.Power Doppler ultrasonography and synovitis: correlating ultrasound imaging with histopathological findings and evaluating the performance of ultrasound equipmentsAnn Rheum Dis2006; 65:1590–1595.
3.
NaredoE.ColladoP.CruzA.Longitudinal power Doppler ultrasonographic assessment of joint inflammatory activity in early rheumatoid arthritis: predictive value in disease activity and radiologic progressionArthritis Rheum2007; 57:116–124.
4.
SzkudlarekM.Court-PayenM.JacobsenS.Interobserver agreement in ultrasonography of the finger and toe joints in rheumatoid arthritisArthritis Rheum2003; 48:955–962.