A comparison of Mallampati classification, thyromental distance and a combination of both to predict difficult intubation - Mallhi, Arif Iftikhar; Abbas, Nighat; Nadeem Naqvi, Syed Muhammad; Murtaza, Ghulam; Rafique, Muhammad; Alam, Syed Sajjad (Anaesthesia, Pain & Intensive Care, 2019)