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[3] Wikipedia-Autoren: Wikipedia Eintrag zu Protonenpumpenhemmer. Abgerufen auf: de.wikipedia.org
[4] Kavi Ramnani, Sayantani Mukherjee und Dana Bisharah (2018): Review of emerging therapy in refractory GERD- an evidence based approach. Gastroenterol Hepatol Open Access. 2018;9(4):150‒152. DOI: 10.15406/ghoa.2018.09.00315
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[8] O.V.: Chondroitin Sulfate. Uses & Effectiveness. WebMD. Natural Medicines Comprehensive Database Consumer Version. Abgerufen auf: https://www.webmd.com/vitamins/ai/ingredientmono-744/chondroitin-sulfate