Source: https://www.researchgate.net/profile/Sabine-Vogler/publication/321919701_Kostenintensive_Krebsmedikamente_-_Preise_im_internationalen_Vergleich_High_cost_oncology_medicines_-_International_comparison_of_prices/links/5a39773f458515889d2ac4c9/Kostenintensive-Krebsmedikamente-Preise-im-internationalen-Vergleich-High-cost-oncology-medicines-International-comparison-of-prices.pdf