1. www.drugdiscoverytoday.com
2. www.cancer.org
3. medicine.jbpub.com
4. www.sciencedirect.com
5. www.cancerinformationgroup.com
6. www.cancerindex.org
7. www.tribunes.com/cancer/homepage.htm
8. www.rare-cancer.org/research-journal.html
9. www.ncbi.nlm.nih.gov
10. freemedicaljournals.com
11. www.protocol-online.org
12. www.cancer.gov
13. www.oup.co.uk
14. www.medscape.com
15. www.biomedcentral.com
