Name Info Provider Link
subscription/membership/fee required Atypon https://cdnsciencepub.com/doi/10.1139/apnm-2023-0178?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
subscription/membership/fee required Ingenta plc https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=48&issue=11&spage=870&aulast=Vatanparast
Vitamin D Deficiency free resource MedlinePlus Health Information https://medlineplus.gov/vitaminddeficiency.html