RT Journal Article SR Electronic T1 Prognostic significance of chronic respiratory symptoms in individuals with normal spirometry JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1902226 DO 10.1183/13993003.02226-2019 VO 55 IS 1 A1 Yunus Çolak A1 Shoaib Afzal YR 2020 UL http://erj.ersjournals.com/content/55/1/1902226.abstract AB Chronic respiratory symptoms in individuals with normal spirometry should lead to clinical follow-up http://bit.ly/35hOtlM