[Infection with virus or atypical pathogen is less often a cause of chronic bronchitis than expected].
Boersma
W G
WG
de Graaff
C S
CS
D016993:Chlamydophila pneumoniae / Q000302:isolation & purification; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000382:microbiology* / Q000821:virology*; D009177:Mycoplasma pneumoniae / Q000302:isolation & purification; D014777:Virus Diseases / Q000821:virology