GENDIA
(http://www.gendia.net)
Website with much information on genetic testing performed by an international network of genetic labs GENDIA.

AML
(http://www.aml-lab.be)
Website of AML, a diagnostic medical lab based in Belgium, and mother lab of GENDIA.

PharmGKB
(http://www.pharmgkb.org)
The PharmGKB website gives very specific information on all genes and gene variations that are associated with response to medication.

INDIANA UNIVERSITY
(http://medicine.iupui.edu/flockhart/)
Website of the division of Clinical Pharmacology of Dr Flockhart at the Indiana university with the P450 Drug Interactions Card. This card contains a table with substrates, inhibitors, and activators for each of the P450 isoform groups.

DUKE INSTITUTE FOR GENOME SCIENCES
(http://www.genome.duke.edu/resources/pharmdb)
Website of the division of Duke Institute For Genome Sciences with information on all published gene variants associated with drug response.

KAROLINSKA INSTITUTE
(http://www.imm.ki.se/CYPAlleles/)
Website of the Institute of Environmental Medicine at the Karolinska Institute in Sweden with all information on the Cytochrome P450 system.