“MeSH” Terminology (Medical Subject Headings)
The Medical Subject Headings comprise NLM's controlled vocabulary used for indexing articles, for cataloging books and other holdings, and for searching MeSH-indexed databases, including MEDLINE. MeSH terminology provides a consistent way to retrieve information that may use different terminology for the same concepts.
The Cream of the Crop
This is the “motherload” of articles, from the National Library of Medicine. They provide access to over 11 million citations from MEDLINE. It's most likely here if it's an “indexed” Journal.
Now starring the new Editor in Chief, George Lundberg, MD who was fired from JAMA after publishing an awesome edition devoted to complementary (alternative) medicine approaches to health care.
Mantis (A database of Chiropractic Literature)
MANTIS includes comprehensive citations and abstracts from all peer-reviewed chiropractic, manual medical and osteopathic journals. This is the “Gold Standard” for alternative manual medicine searches!