Article History
Received: 25 December 2017
Accepted: 4 January 2018
First Online: 23 February 2018
Compliance with ethical standards
:
: N. Aide received a research grant from Siemens for the work described in reference CitationRef removed. Other authors declare no conflicts of interest related to this submission.
: According to European regulations, French observational studies without any additional therapy or monitoring procedures do not need ethics approval. Nonetheless, approval to collect data for results presented here was obtained from the National Committee for Data Privacy (registration no. 2084622v0).