Editorial on research topic: Surgery and COVID-19 in oncologic patients: What does the recent coronavirus pandemic taught us? - Cioffi, Ugo; Chiarelli, Marco; Testori, Alberto; De Simone, Matilde; Ciulla, Michele M.; Calderoni, Matteo; Cassina, Enrico; Scarci, Marco; Raveglia, Federico (Frontiers in Surgery, 2023)