Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1096-7192(09)00138-3
Congenital Heart Defects free resource MedlinePlus Health Information https://medlineplus.gov/congenitalheartdefects.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19553149/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/19553149