TO THE EDITORTo the Editor We thank Dr. Ahmed Ansari for his Knowledgeable Comments on our StudyYagi, Mitsuru MD, PhD; Watanabe, Kota MD Author Information Keio University, School of Medicine, Shinjyuku, Tokyo, Japan. Address correspondence and reprint requests to Kota Watanabe, MD, Shinjyuku, Tokyo 160-8582 Japan; E-mail: [email protected] The manuscript submitted does not contain information about medical device(s)/drug(s). No funds were received in support of this work. No relevant financial activities outside the submitted work. SPINE: September 15, 2020 - Volume 45 - Issue 18 - p E1214 doi: 10.1097/BRS.0000000000003621 Buy Metrics Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.