RT Journal Article SR Electronic T1 Geographic distribution of COPD prevalence in the world displayed by Geographic Information System maps JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1900610 DO 10.1183/13993003.00610-2019 VO 54 IS 1 A1 Ignacio Blanco A1 Isidro Diego A1 Patricia Bueno A1 Francisco Casas-Maldonado A1 Marc Miravitlles YR 2019 UL http://erj.ersjournals.com/content/54/1/1900610.abstract AB