Karez Namiq Kakarash; Vian Afan Naqshbandi. Comparison Between the Effectiveness of McKenzie Extension Exercises and William Flexion Exercises for Treatment of Acute or Sub-Acute Low Back Pain. J Popl Ther Clin Pharmacol 2023, 30 (8), 123-133. https://doi.org/10.47750/jptcp.2023.30.08.013.