del-Amo, R.
Carrasco-Gallego, R.
Chapter History
First Online: 31 May 2022
Compliance with Ethical Standards
: The Ethical Committee for Research Activities at UPM (“Comité de Ética de actividades de I + D + i de la UPM”, ) approves the survey procedure conducted in this research. No personal data of the respondents of the survey were collected or treated (survey respondents were anonymous); hence, there is no need for a particular reference for the authorization for the experiment, as mentioned in the waiver (MOD.6 Identificación de Cuestiones Éticas en los Proyectos, Contratos, Subvenciones o Colaboraciones).