Corsello, Calogero. “Capsular Expansion After Ultrasound-Guided Injection of the Hip As Parameter of Efficacy: Description of Technique and Report of Preliminary Data”. Beyond Rheumatology 2, no. 2 (September 8, 2020): 61-64. Accessed October 26, 2020. http://beyond-rheumatology.org/index.php/br/article/view/35.