Adolescents’ physical activity trends over the years: a three-cohort study based on the Health Behaviour in School-aged Children (HBSC) Portuguese survey
Crossref DOI link: https://doi.org/10.1136/bmjopen-2014-006012
Published Online: 2014-10-06
Published Print: 2014-10
Update policy: https://doi.org/10.1136/crossmarkpolicy
Marques, Adilson
Gaspar de Matos, Margarida
