Luthfiyah S, Utomo B, Ariswati HG. Use Chest Vibrator to Prevent Pulmonary Infection in Patients with COPD . ijeeemi [Internet]. 2025 Aug. 20 [cited 2026 Apr. 19];1(2):81-4. Available from: https://mail.ijeeemi.org/index.php/ijeeemi/article/view/255