Akhgar, Atousa, Shamim Bahrami, Payam Mohammadinejad, Zahra Khazaeipour, and Hooman Hossein-Nejad. “A New Formula for Confirmation of Proper Endotracheal Tube Placement With Ultrasonography”. Advanced Journal of Emergency Medicine 3, no. 3 (May 16, 2019): e25. Accessed October 22, 2019. http://ajem.tums.ac.ir/index.php/ajem/article/view/154.