Prospective Study on Determination of Optimal Drainage Volume in Massive Pleural Effusion Based on Pleural Effusion Index. eCl [Internet]. 2022 Sep. 5 [cited 2026 Oct. 31];10(2):372-8. Available from: https://ejournal.unsrat.ac.id/v3/index.php/eclinic/article/view/41495