Name	Info	Provider	Link
Smoking and Youth	free resource	MedlinePlus Health Information	https://medlineplus.gov/smokingandyouth.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32022150/
Full Text at the institutional repository	free resource	Andalusian Health Repository	http://hdl.handle.net/10668/15047
	free resource	Scientific Electronic Library Online	https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-11692020000100302&lng=en&nrm=iso&tlng=en
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/32022150
Exercise and Physical Fitness	free resource	MedlinePlus Consumer Health Information	https://medlineplus.gov/exerciseandphysicalfitness.html