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