J. Lualon, S. Plumworasawat, B. Phruttinarakorn, R. Chansom, B. Charoenthanuchwong, and A. Pongtippan, “Pleural Fluid Volume for Cytological Diagnosis of Malignancy: How Much Is Optimum”, Res Med J, vol. 49, no. 2, p. e274960, Jan. 2026.