İlker Turan, Özden Dedeli, Serhat Bor, and Tankut İlter. 2019. “Effects of a Kefir Supplement on Symptoms, Colonic Transit, and Bowel Satisfaction Score in Patients With Chronic Constipation: A Pilot Study”. Turkish Journal of Gastroenterology 25 (6):650-56. https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/3053.