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APA Citation
Stellingwerf, M. E., van Praag, E. M., Tozer, P. J., Bemelman, W. A., & Buskens, C. J. (2019). systematic review and meta-analysis of endorectal advancement flap and ligation of the intersphincteric fistula tract for cryptoglandular and Crohn's high perianal fistulas. BJS open, 3(3), 231–241. http://access.bl.uk/ark:/81055/vdc_100121928110.0x000005