Health effects of exposure to residential air pollution in patients with pulmonary arterial hypertension: a cohort study in Belgium

We read with interest the paper by Sofianopoulou et al . [1]. The authors have significantly contributed to highlight the potential link between air pollution and health outcomes among pulmonary arterial hypertension (PAH) patients, by showing that, exposure to particulate matter with an aerodynamic diameter smaller than 2.5 µm (PM2.5) was significantly associated with transplant-free survival, and traffic-related air pollution was correlated with the European Society of Cardiology (ESC)/European Respiratory Society (ERS) risk categories and haemodynamics at baseline. Footnotes This manuscript has recently been accepted for publication in the European Respiratory Journal . It is published here in its accepted form prior to copyediting and typesetting by our production team. After these production processes are complete and the authors have approved the resulting proofs, the article will move to the latest issue of the ERJ online. Please open or download the PDF to view this article. Conflict of interest: Katleen Swinnen has nothing to disclose. Conflict of interest: Esmée Bijnens has nothing to disclose. Conflict of interest: Lidia Casas has nothing to disclose. Conflict of interest: Tim S. Nawrot has nothing to disclose. Conflict of interest: Marion Delcroix has nothing to disclose. Conflict of interest: Rozenn Quarck has nothing to disclose. Conflict of interest: Catharina Belge has nothing to disclose.