Some of famous journal article databases
1.
National Library of health (NLH):
http://www.library.nhs.uk/Default.aspx
2.
PubMed:
http://www.ncbi.nlm.nih.gov/sites/entrez/
3.
Cochrane Library:
http://www.thecochranelibrary.com/
4.
SumSearch:
http://sumsearch.uthscsa.edu/
