Received: 23 June 2019
Accepted: 6 January 2020
First Online: 13 January 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Research Committee of the Champalimaud Clinical Centre (CCC) while written patient informed consent was waved due to the retrospective, observational nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.