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APA Citation
de Groof, E. J., Sahami, S., Lucas, C., Ponsioen, C. Y., Bemelman, W. A., & Buskens, C. J. (2016). treatment of perianal fistula in Crohn's disease: a systematic review and meta‐analysis comparing seton drainage and anti‐tumour necrosis factor treatment. Colorectal disease, 18, 667–675. http://access.bl.uk/ark:/81055/vdc_100034810747.0x000021