PUBMED www.ncbi.nlm.nih.gov/
EMBASE www.embase.com
CINHAL www.cinahl.com
MEDLINE PLUS www.nlm.nih.gov/
TOXNET toxnet.nlm.nih.gov
TRIP DATABASE www.tripdatabase.com
CLINICAL EVIDENCE www.clinicalevidence.
CBIOMED CENTRAL www.biomedcentral.com
PROGRAMMA NAZIONALE LINEE GUIDA www.pnlg.it/