Karez Namiq Kakarash, & Vian Afan Naqshbandi. (2023). Comparison between the Effectiveness of McKenzie Extension Exercises and William Flexion Exercises for Treatment of Acute or Sub-acute Low Back Pain. Journal of Population Therapeutics and Clinical Pharmacology, 30(8), 123–133. https://doi.org/10.47750/jptcp.2023.30.08.013