Funding for this research was provided by:
Universidade Nova de Lisboa
Received: 26 June 2019
Accepted: 7 February 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Beatriz Angelo Hospital (<i>N/Ref.</i> 1712/2016_MJHEB) and Ethics Committee of S. Francisco Xavier Hospital (CES, December 2019). All the patients, or their legal representatives, gave a written informed consent to participate in this study.
: Some of the authors are members of the Infection unit of the Faculty of Medical Sciences-NOVA Medical School, and participated in study design, the collection and analysis of the samples, interpretation of data and in writing the manuscript.