Alvina Khan, Inayat Ali Khan, Ali Anwar, Sadaf Keerio, Qurat-ul-Ain, Adeeba Qasim 2026. Preoxygenation in the Head-Up (40°) Position versus Supine Position in the Obese Patients with Severe Head Trauma Requiring Intubation . International Journal of Pharmacy Research & Technology (IJPRT). 16, 1 (Apr. 2026), 1699–1703.