Fistula formation in hepatic cystic echinococcosis: clinical impact, predictors, and outcomes from a 27-year cohort - Inmaculada Izquierdo Pérez; Amparo López-Bernus; Angela Romero Alegría; Montserrat Alonso-Sardón; Beatriz Rodriguez Alonso; Hugo Almeida; Josué Pendones; Javier Pardo-Lledías; Moncef Belhassen-García (Transactions of The Royal Society of Tropical Medicine and Hygiene, 2026)