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• http://www.knack.be/nieuws/gezondheid/onderzoekers-uz-gent-forceren-doorbraak-in-strijd-tegen-ziekte-van-crohn/article-normal-883921.html
• http://www.thelancet.com/journals/lancet/article/PIIS0140-6736%2817%2931327-2/fulltext?elsca1=tlxpr
• https://commons.wikimedia.org/wiki/File%3ABronkoskop.jpg
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