Stecco, Antonio, Carmelo Pirri, Raffaele De Caro, and Preeti Raghavan. “Stiffness and Echogenicity: Development of a Stiffness-Echogenicity Matrix for Clinical Problem Solving”. European Journal of Translational Myology 29, no. 3 (September 12, 2019). Accessed April 19, 2024. https://www.pagepressjournals.org/bam/article/view/8476.