Purpose: "BioMed Central is an independent publishing house committed to providing immediate free access to peer-reviewed biomedical research." [1]
Audience: People researching topics in the field of biomedicine.
Scope: Biomedical research.
Refresh Rate: ?
Further Information: In order to perform advanced searches on BioMed Central, you are required to create a login name and password. This is free but somewhat inconvenient.
BioMed Central also allows a number of searches which can only be done using templates on their web pages. These include content sets (BioMed Central Journals, The Scientist news), date ranges, and "added in last" (last 1 day, 7 days, 30 days).
Other features not directly impacting search results include number of results shown per page, order in which results are shown, and whether to show the abstract or not.
The Following example will find all articles written by someone named either "jones" or "smith" and that contains the word "assessment" and the word "pain" in the body of the text.
(jones [AU] OR smith [AU) AND assessment [BDY] AND pain [BDY]