The value of contrast-enhanced color Doppler ultrasound in the detection of vascularization of finger joints in patients with rheumatoid arthritis. - Klauser,A.; Frauscher,F.; Schirmer,M.; Halpern,E.; Pallwein,L.; Herold,M.; Helweg,G.; ZurNedden,D. (Arthritis Rheum, 2002)