“PETKO: Pilates Exercise Training before Knee Arthroplasty in Patients With Osteoarthritis A Two-Arm, Randomized, Open-Label Assessor Blinded Phase II Clinical Trial”. Principles and Practice of Clinical Research 2, no. 2 (November 8, 2016). Accessed May 5, 2024. https://journal.ppcr.org/index.php/ppcrjournal/article/view/34.