Funding for this research was provided by:
Agencia Estatal de Investigación (ENPY 120/18)
Spanish Consumers' Organization (Noy applicable)
Text and Data Mining valid from 2019-11-21
Received: 4 February 2019
Accepted: 7 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: Ethical approval was obtained from our resident Ethics Research Committee (Carlos III Institute of Health). All procedures performed were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All participants provided informed consent to participate. For minor participants, aged 12 to 15 years, consent was also provided by their parents or their accompanying adult relatives. The informed consent was verbal, as approved by the ethics committee, because no personal data was collected. To better protect participant confidentiality, neither the name nor the ID number or personal address of the participants was collected.
: Not applicable.
: The authors declare that they have no competing interests.