Serrano Oleas MJ, Cevallos Sacoto FA. Determination of the tracheal diameter with ultrasound and its relationship with the tube calculation formula in children aged 1 to 12 years: Original Research. REV-SEP [Internet]. 2022Apr.14 [cited 2024Apr.25];23(1):11-20. Available from: https://rev-sep.ec/index.php/johs/article/view/144