There are differences between the medical agencies (FDA, EMA etc.) world-wide which decide whether a drug is approved in their country or not. Even within Europe, although therapy protocols might be approved by the European Medical Agency (EMA), several countries have their own review organizations in order to evaluate whether the same therapy protocol would be "cost-effective", so that patients face differences in the therapy protocols, particularly in the access of these drugs, which might be partially explained by the financial strength of the particular Health System.
