Lapian, J., Tangkilisan, A., Sukanto, W., Tamburian, C. and Langi, F.G. 2022. Prospective Study on Determination of Optimal Drainage Volume in Massive Pleural Effusion Based on Pleural Effusion Index. e-CliniC. 10, 2 (Sep. 2022), 372–378. DOI:https://doi.org/10.35790/ecl.v10i2.41495.