1. Pfuntner A, Wier LM, Stocks C. Most frequent procedures performed in U.S. hospitals, 2011. In: Health Care in the United States: Developments and Considerations [Internet]. 2014. Available from: https://www.ncbi.nlm.nih.gov/books/NBK174682/
2. Techniques, success, and adverse events of emergency department adult intubations;Brown;Ann Emerg Med,2015
3. The physiologically difficult airway;Mosier;West J Emerg Med,2015
4. Russotto V, Myatra SN, Laffey JG, Tassistro E, Antolini L, Bauer P, et al. Intubation Practices and Adverse Peri-intubation Events in Critically Ill Patients from 29 Countries. JAMA. 2021 Mar 23;325(12):1164-72.
5. Evaluation of an improved scoring system for the grading of direct laryngoscopy;SM;Anaesthesia,1998