Use the following sections to select at least two databases to search. You may wish to start with a general biomedical database, like PubMed, and then supplement it with one more focused on a topic relevant for your protocol, like behavior, or one that allows you to search methods more thoroughly by allowing you to search full-text.
Most databases search only the title, abstract, and some descriptors added by the database or authors. In many cases, especially when looking for detailed methods, a search of the full-text of an article is best. The following resources may not comprehensive in scope, but do allow full-text searching and may be a good complement to a search of PubMed or Biological Abstracts.