Laurent Quéro, Sophie Guillerm, Christophe Hennequin, Department of Radiation Oncology, Saint Louis Hospital, 75010 Paris, France
Author contributions: Quéro L designed, researched and analyzed the literature, and helped write the paper; Guillerm S and Hennequin C analyzed the literature, and helped write the paper.
Conflict-of-interest statement: The authors have no conflict of interest related to the manuscript.
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: Laurent Quéro, MD, PhD, Department of Radiation Oncology, Saint Louis Hospital, 1 Avenue Claude Vellefaux, 75010 Paris, France. firstname.lastname@example.org
Telephone: +33-142-499034 Fax: +33-142-494081
Received: March 10, 2015
Peer-review started: March 13, 2015
First decision: April 13, 2015
Revised: May 8, 2015
Accepted: July 11, 2015
Article in press: July 14, 2015
Published online: August 15, 2015