*2.6. Ethical Considerations*

This study was designed in accordance with Spanish Organic Law 03/2018 on Personal Data Protection and Guaranteeing Digital Rights. Additional provision 17 on processing of health data, paragraph 2g, specifies that studies with pseudomized or anonymized data must be submitted for evaluation by an ethics and research committee. This study did not experiment with human beings and the participants answered voluntarily and anonymously and no personal data that could identify each participant, email, or IP address were collected to guarantee confidentiality, so it did not need approval by an ethics and research committee. The first page of the survey included information on the study objective and methodology, along with a box with which the participants gave their informed consent, confirming that their participation was voluntary and anonymous. Moreover, Declaration of Helsinki Principles were respected (charity, non-maleficence, autonomy, justice).
