Djajalaksana, S., Listyoko, A.S., Prasetyo, K.W. and Wardoyo, A.Y.P. 2024. Volatile Organic Compounds (VOC) and Serum Leukotriene B4 between COPD Patients and COPD with Lung Cancer Patients. Jurnal Respirasi. 10, 3 (Sep. 2024), 222–227. DOI:https://doi.org/10.20473/jr.v10-I.3.2024.222-227.