Exhaled Breath Condensate as a Non-Invasive Biomarker of Oxidative Stress in Smokers: A Cross-Sectional Case–Control Study: Oxidative Stress . PMS [Internet]. 2025 Nov. 30 [cited 2026 Jun. 21];1(3). Available from: https://pms-journal.de/index.php/pms/article/view/37