Foto: "<a href="https://ccnull.de/foto/an-oncologist-with-a-red-ribbon-a-symbol-of-world-cancer-day/1027986" target="_blank">An oncologist with a red ribbon - a symbol of world cancer day</a>" von <a href="https://ccnull.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="https://ccnull.de" target="_blank">ccnull.de</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>