Comments on "Tube-in-tube endoscopic vacuum therapy for the closure of upper gastrointestinal fistulas, leaks, and perforations" - Dioscoridi, Lorenzo; Mutignani, Massimiliano; Pugliese, Francesco; Bonato, Giulia; Cintolo, Marcello; Bravo, Marianna; Forti, Edoardo (Endoscopy, 2023)