1. EudraLex. The rules governing medicinal products in the European Union. http://ec.europa.eu/enterprise/pharmaceuticals/eudralex/index.htm
2. Reimbursement for cancer treatment: coverage of off-label drug indications;American Society of Clinical Oncology;J Clin Oncol,2006
3. Off-label prescribing in oncology;Poole;Support Care Cancer,2004
4. Reimbursement policies constrain the practice of oncology;Laetz;JAMA,1991
5. Unlicensed and off label drug use in acute lymphoblastic leukaemia and other malignancies in children;Conroy;Ann Oncol,2003