Received: 17 May 2019
Accepted: 5 October 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: The protocol was approved on 22 July 2011 by the Germans Trias i Pujol Hospital Ethics Committee for Investigation (reference EO-11-061). Patients or their representatives provided written informed consent.
: Not applicable.
: AB-G received honoraria for lectures and for advisory board participation, from Roche Diagnostics. The other authors report no competing interests.