Lindra DA, Savira, Mukhtar D, Umniyati H, Purwaningsih E, Utomo ARH, Yunus F. Optimal Finger Selection for Perfusion Index Measurement in Patients with Stable Chronic Obstructive Pulmonary Disease. Pak J Chest Med [Internet]. 2026Sep.2 [cited 2026Oct.10];32(3):197-202. Available from: https://mail.pjcm.net/index.php/pjcm/article/view/1110