Review Article Comparing upper airway awake exploration, drug-induced sleep endoscopy and natural sleep—a systematic review Silvia Matarredona-Quiles, Paula Martínez-Ruiz-de-Apodaca, Joana Vaz de Castro, Elena González-Turienzo, Giovanni Cammaroto, Marina Carrasco-Llatas Published online: 17 April 2024 PDF Reporting Checklist Peer Review File COI Form Open Access