Article History
Received: 27 November 2017
Accepted: 8 January 2018
First Online: 20 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards of the institutional research committee (Comithee d’ethique de l’etablissement, Hopital Neurologique de Lyon) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.This was an imagery study performed with clinical data collected from patient files collected prospectively. For this type of study, formal consent is not required. All patients, however, gave informed consent for the procedure and the study.