Lubis FM, Yuliadi T, Zen IM. The Relationship Between E-Cigarette Use and Propylene Glycol Content in Males Aged 17–25 Years with the FEV1 and FVC Ratios in Relation to COPD in South Jakarta and its Analysis from an Islamic Perspective. JISS [Internet]. 2026Jan.15 [cited 2026Jan.31];7(1):196-213. Available from: https://jiss.publikasiindonesia.id/index.php/jiss/article/view/2188