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Jain, M., Venkataraman, J. Vitamin D levels in ulcerative colitis at first diagnosis: Does it “bell the cat”?. Indian J Gastroenterol 37, 276–277 (2018). https://doi.org/10.1007/s12664-018-0853-x
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DOI: https://doi.org/10.1007/s12664-018-0853-x