Comparison between Acrylic Cage and Polyetheretherketone (PEEK) Cage in Single- Level Anterior Cervical Discectomy and Fusion: A Randomized Clinical Trial Majid Reza Farrokhi, MD,†* Zahra Nikoo, MD†, Mehrnaz Gholami, MA†, Khadijeh Hosseini, BS† † Shiraz Neurosciences Research Center, Neurosurgery Department, Shiraz University of Medical Sciences, Shiraz, Iran. Conflicts of Interest: The authors have no conflicts of interest to report as follows: MRF – none ZN – none MGH – none KH – none Source of Funding: This article has no source of funding. The Vice-chancellor for research affairs of Shiraz University of Medical Sciences and Apadana Tajhizgostar Co. provided grant support but had no role in the design of the trial, the collection or analysis of data, preparation of the manuscript or the decision to submit it for publication. The study was approved by research ethics committee and the institutional review board (IRB) of Shiraz University of Medical Sciences on May 14, 2011 (approval number: CT-89-5523), and it was registered online at www.irct.ir (IRCT138807132193N3). * Corresponding author: Majid Reza Farrokhi, Prof., MD, Professor of Neurosurgery, Shiraz Neurosciences Research Center, Neurosurgery Department , Shiraz University of Medical Science, Shiraz, Iran Address for correspondence: Prof. Majid Reza Farrokhi, Shiraz Neurosciences Research Center, Chamran Hospital, Chamran Boulevard, Shiraz, Iran. PO Box: 7194815644 Tel: +98711-6234508 Fax: +98711-6234508 E-mail: farrokhimr@yahoo.com E-mail: farokhim@sums.ac.ir E-mail: farrokhi_drmr@yahoo.com Copyright © 2015 Wolters Kluwer Health, Inc. Unauthorized reproduction of the article is prohibited. Journal of Spinal Disorders and Techniques Publish Ahead of Print DOI:10.1097/BSD.0000000000000251