Kabil AE, Sobh E, Elsaeed M, Hassanin HE, Yousef IH, Eltrawy HH, et al. Diaphragmatic excursion by ultrasound: reference values for the normal population; a cross-sectional study in Egypt. Multidiscip Respir Med [Internet]. 2022 Jun. 1 [cited 2025 Jun. 30];17. Available from: https://mail.mrmjournal.org/index.php/mrm/article/view/842