For citations:

Orlova L.P., Kiselev D.O., Kostarev I. Anal fistula ultrasound assessment (comparison of conventional and intracavitary contrast-enhanced endorectal ultrasound). Ultrasound & Functional Diagnostics. 2020;(3):26-39. (In Russ.) https://doi.org/10.24835/1607-0771-2020-3-26-39