Text and Data Mining valid from 2018-05-08
Received: 29 January 2018
Accepted: 30 April 2018
First Online: 8 May 2018
Compliance with ethical standards
: All authors declare that they have no conflict of interest.
: The research protocol complied with the principles of the Declaration of Helsinki and was approved by the ethics committee of Toulouse University Hospital and the Consultative Committee for Treatment of Research Information on Health (CNIL: 07-438).
: For this type of study formal consent is not required.