Antonio Andreacchio, Lorenza Marengo, Department of Pediatric Orthopedic Surgery, Regina Margherita Children’s Hospital, 10100 Torino, Italy
Federico Canavese, Department of Pediatric Surgery, University Hospital Estaing, 63003 Clermont Ferrand, France
Author contributions: Andreacchio A and Canavese F designed and performed the research and wrote the paper; Marengo L contributed to the analysis and revised the text.
Institutional review board statement: The study was reviewed and approved by the local Institutional Review Board (Comité de Protection des Personnes Sud-Est 6; ref. 2016/CE01).
Informed consent statement: Patients were not required to give informed consent to the study because the analysis used anonymous clinical data that were obtained after each patient agreed to treatment by written consent.
Conflict-of-interest statement: The authors declare that they have no conflict of interest.
Data sharing statement: No additional data are available.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Federico Canavese, MD, PhD, Professor of Pediatric Orthopedic Surgery, Department of Pediatric Surgery, University Hospital Estaing, 1 place Lucie et Raymond Aubrac, 63003 Clermont Ferrand, France. firstname.lastname@example.org
Telephone: +33-4-73750293 Fax: +33-4-73750291
Received: February 23, 2016
Peer-review started: February 25, 2016
First decision: April 15, 2016
Revised: May 13, 2016
Accepted: June 1, 2016
Article in press: June 3, 2016
Published online: August 18, 2016