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Khalili, Hamed; de Silva, Punyanganie S.; Ananthakrishnan, Ashwin N.; Lochhead, Paul; Joshi, Amit; Garber, John J.; Richter, James R.; Sauk, Jenny; Chan, Andrew T. . (2017). Dietary Iron and Heme Iron Consumption, Genetic Susceptibility, and Risk of Crohnʼs Disease and Ulcerative Colitis. Inflammatory Bowel Diseases, 23(7), 1088–1095. doi:10.1097/MIB.0000000000001161 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research