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APA Citation
Sjöberg, K., Vigren, L., Roth, B., Malm, J., Manjer, J., Almquist, M., & Ohlsson, B. (2013). vitamin D levels in microscopic colitis. Scandinavian journal of gastroenterology, 48, 987–988. http://access.bl.uk/ark:/81055/vdc_100040139585.0x000001