Figure 1
From: Smoking, season, and detection of chlamydia pneumoniaeDNA in clinically stable COPD patients
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2334-2-12/MediaObjects/12879_2002_Article_36_Fig1_HTML.jpg)
Relation of Chlamydia pneumoniae (CP) DNA prevalence in blood peripheral mononuclear cells versus month of study visit among 100 patients presenting to a respirology referral clinic. CP-DNA positive (solid), CP-DNA negative (thatched) or proportion of all monthly specimens which were CP-DNA positive (line).