Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (UID/Multi/04546/2016, UID/Multi/04546/2013, UID/Multi/04546/2019)
Text and Data Mining valid from 2019-07-26
Received: 23 April 2019
Accepted: 12 July 2019
First Online: 26 July 2019
Compliance with Ethical Standards
: The authors declare no conflicts of interest.
: The work was approved by the University Fernando Pessoa Ethics committee and done in accordance with the ethical standards as laid down by the 14964 Declaration of Helsinki and later amendments. All data acquisitions were done using a Individual ID code known only to the voluntary subject. Database was authorized and registered with the National Individual Data Protection committee and contains no data capable of identifying the subject under study.
: Informed consent was obtained from all individual participants included in the study, prior to any sample or data acquisition. Informed consent forms were approved by the University ethics committee. Voluntaries were allowed to drop the study at any time during the observation period.