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Authors
Rocha, Vânia https://orcid.org/0000-0001-7928-6387
Severo, Milton
Ramos, Elisabete
Falcão, Helena
Stringhini, Silvia
Fraga, Sílvia
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Article History
Received: 19 February 2020
Revised: 17 October 2020
Accepted: 11 January 2021
First Online: 18 February 2021
Competing interests
: The authors declare no competing interests.
: This study was approved by the Ethics Committee of the Hospital S. João, the Ethics Committee of the Institute of Public Health and by the Portuguese data protection authority. Written informed consent was obtained from parents and adolescents at 13 and 17 years and from young adults at 21 years of age.
