Title: Community determinants of COPD exacerbations in elderly patients in Lodz Province, Poland: a retrospective observational Big Data cohort study
Authors: Anna Kowalczyk , Katarzyna Kosiek , Maciek Godycki-Cwirko , Izabela Zakowska
Journal: BMJ Open
Publication type: article
DOI: 10.1136/bmjopen-2021-060247