Agreement Between Diaphragm Ultrasound and Pulmonary Function Testing in the Evaluation of Diaphragm Function in Patients with ALS. GJMR [Internet]. 2023 Jun. 20 [cited 2026 Feb. 4];23(F4):19-25. Available from: https://testing.medicalresearchjournal.org/index.php/GJMR/article/view/102371