Mallhi, Arif Iftikhar, Nighat Abbas, Syed Muhammad Nadeem Naqvi, Ghulam Murtaza, Muhammad Rafique, and Syed Sajjad Alam. 2019. “A Comparison of Mallampati Classification, Thyromental Distance and a Combination of Both to Predict Difficult Intubation”. Anaesthesia, Pain & Intensive Care 22 (4). https://apicareonline.com/index.php/APIC/article/view/1028.