TY  - RPRT
TI  - Chronic bronchitis in an elderly population.
AU  - Peter Lange
AU  - Jan Parner
AU  - Eva Prescott
AU  - Jørgen Vestbo
PY  - 2003
DO  - 10.1093/ageing/afg108
UR  - https://pubmed.ncbi.nlm.nih.gov/14600005/
ID  - 14600005
ER  -