Meegada, S. R., Alapati, K. V., & Varughese, M. (2024). Importance of high-frequency and low-frequency three-dimensional endoanal ultrasound scan in diagnosing perianal fistula and abscess. International Surgery Journal, 11(6), 908–917. https://doi.org/10.18203/2349-2902.isj20241389