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Balciscueta, Zutoia; Uribe, Natalia; Balciscueta, Izaskun; Andreu-Ballester, Juan Carlos; García-Granero, Eduardo . (2017). Rectal advancement flap for the treatment of complex cryptoglandular anal fistulas: a systematic review and meta-analysis. International Journal of Colorectal Disease, 32(5), 599–609. doi:10.1007/s00384-017-2779-7 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research