Conditioned Pain Modulation in Chronic Low Back Pain: A Systematic Review of Literature Authors: Y.V.Raghava.N. Neelapala, MPT 1 ; Madhura Bhagat, MPT 1 ; Laura Frey-Law, MPT, MS, PhD 2 1.Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Karnataka, India 2. Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, University of Iowa, Iowa City, IA USA Corresponding author: Y V Raghava Neelapala, Assistant Professor, Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Karnataka, India- 576104. Email: yv.raghava@manipal.edu; Mobile: +91 9482773219 Copyright © 2019 Wolters Kluwer Health, Inc. Unauthorized reproduction of the article is prohibited. The Clinical Journal of Pain Publish Ahead of Print DOI:10.1097/AJP.0000000000000778 ACCEPTED