“The Efficacy of Duloxetine and Exercise Compared to Exercise Alone in Patients With Knee Osteoarthritis: A 12-Week, Randomized, Double-Blinded, Parallel Trial”. Principles and Practice of Clinical Research 5, no. 1 (July 5, 2019): 14–20. Accessed May 1, 2024. https://journal.ppcr.org/index.php/ppcrjournal/article/view/64.