(Don't think I saw this here):
Large medical journal databases index articles from thousands of journals all across the world.

Here are just a few databases commonly used by credible medical search engines:

EMBASE – owned by Elsevier with over 29 million records
MEDLINE – contains more than 22 million biomedical published articles in its archive
PsycINFO – contains more than 3.5 million records
Cochrane Database of Systematic Reviews (CDSR)
MedlinePlus

https://www.nlm.nih.gov/bsd/difference.html

Large medical journal databases index articles from thousands of journals all across the world.

Here are just a few databases commonly used by credible medical search engines:

EMBASE – owned by Elsevier with over 29 million records
MEDLINE – contains more than 22 million biomedical published articles in its archive
PsycINFO – contains more than 3.5 million records
Cochrane Database of Systematic Reviews (CDSR)
MedlinePlus

https://www.nlm.nih.gov/bsd/difference.html