Over the last two decades, the mortality rates associated with cancer have steadily decreased, constituting an overall fall of 23% in 21 years . This decrease in cancer cases can be explained by better prevention and an earlier diagnosis, together with better and more effective treatment options. Although mortality rates are declining, cancer is still among the leading causes of death and morbidity worldwide, with the number of cases estimated to rise by 70% in the next twenty years, according to the GLOBOCAN project .