Zufferey, P., Tamborrini, G., Gabay, C., Krebs, A., Kyburz, D., Michel, B., Moser, U., Villiger, P., So, A. and Ziswiler, H. R. (2013) ‚ÄúRecommendations for the use of ultrasound in rheumatoid arthritis: literature review and SONAR score experience‚ÄĚ, Swiss Medical Weekly, 143(5152), p. w13861. doi: 10.4414/smw.2013.13861.