Consensus Guidelines on Perioperative Care in Primary Retroperitoneal Sarcoma Surgery. - Lominchar PL; Díaz-Cambronero Ó; Muñoz-Muñoz P; Fernández-Candela A; Hernández-Sánchez P; Javaloyes N; Olivares V; Rodrigues CC; Prieto Nieto I; Díaz-Gómez D; Ibañez CB; Pinto P; et al. (Annals of surgical oncology, 2026)