The socioeconomic burden of chronic lung disease in low-resource settings across the globe – an observational FRESH AIR study oleh Evelyn A. Brakema, Aizhamal Tabyshova, Rianne M. J. J. van der Kleij, Talant Sooronbaev, Christos Lionis, Marilena Anastasaki, Pham Le An, Luan Than Nguyen, Bruce Kirenga, Simon Walusimbi, Maarten J. Postma, Niels H. Chavannes, Job F. M. van Boven, On behalf of the FRESH AIR collaborators