==== Front Exp AnimExp. AnimEXPANIMExperimental Animals1341-13571881-7122Japanese Association for Laboratory Animal Science 3005861955.457r110.1538/expanim.55.457r1RetractionRetraction: Effect of Pre- and Post-Surgery Treatment with Risedronate on Trabecular Bone Loss in Ovariectomized Rats IWAMOTO Jun 1TAKEDA Tsuyoshi 1SATO Yoshihiro 2SHEN Chwan-Li 3YEH James K. 41) Department of Sports Medicine, Keio University School of Medicine2) Department of Neurology, Mitate Hospital3) Department of Pathology, Texas Tech University Health Sciences Center4) Metabolism Laboratory, Department of Medicine, Winthrop-University HospitalAddress corresponding: J. Iwamoto, Department of Sports Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.1 8 2018 2018 1 8 2018 67 3 r3 r3 ©2018 Japanese Association for Laboratory Animal Science2018This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0: https://creativecommons.org/licenses/by-nc-nd/4.0/) ==== Body The following articles have been retracted by the Editorial Board of Experimental Animals, because some parts of their contents were published elsewhere.