Accepted Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/codi.14002 This article is protected by copyright. All rights reserved. Article type : Original Article 317-2017.R3 Stem Cell Therapy in Refractory Perineal Crohn´s Disease: Long-term Follow-up Authors: Claudio Wainstein, Rodrigo Quera, Daniela Fluxá, Udo Kronberg, Alejandro Conejero, Francisco López-Köstner, Claudio Jofre, Alejandro J. Zarate. Claudio Wainstein, MD, Colorectal Surgery Unit, Clínica Las Condes, Santiago, Chile. Rodrigo Quera, MD, Inflammatory Bowel Disease Program, Gastroenterology Department, Clínica Las Condes, Santiago, Chile. Daniela Fluxá, MD, Fellow in “Management of Intestinal Diseases”, Gastroenterology Department, Clínica Las Condes, Santiago, Chile. Udo Kronberg, MD, Inflammatory Bowel Disease Program, Colorectal Surgery Unit, Clínica Las Condes, Santiago, Chile. Alejandro Conejero, MD, Plastic Surgery Service, Clínica Las Condes, Santiago, Chile. Francisco López-Kostner, MD, Colorectal Surgery Unit, Clínica Las Condes, Santiago, Chile. Claudio Jofre, PhD in Biotechnology, Laboratory for Tissue Engineering, Clínica Las Condes, Santiago, Chile.