Foto: "<a href="https://www.ccnull.de/foto/close-up-a-drop-at-the-tip-of-the-needle-drugs-concept-background/1014695" target="_blank">Close-up, a drop at the tip of the needle. Drugs concept background</a>" von <a href="https://www.ccnull.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="https://www.ccnull.de" target="_blank">ccnull.de</a> - <a href="https://www.flickr.com/photos/30478819@N08/50206089451/" target="_blank">Bildquelle</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>