A. Ferrari, A. Corrêa Fernandes, R. de Almeida Agustinelli, H. Seike, and E. de Ávila Fernandes, “Tophi reduction: ultrasound imaging and correlation with plasma levels of uric acid in patients undergoing treatment for tophaceous gout”, Reumatismo, vol. 71, no. 2, pp. 75–80, Jul. 2019.