Text and Data Mining valid from 2019-04-16
Received: 14 January 2019
Accepted: 26 March 2019
First Online: 16 April 2019
Compliance with ethical standards
: All authors declared that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki Declaration and its later amendments. In France, this search is considered like a non-interventional study according to European legislation and only a declaration to the CNIL (French data protection authority) is required: authorization granted number 1907874. All patients were individually informed that their data should be used to scientific research.