Fig. 1From: Combined and interaction effect of chlamydia pneumoniae infection and smoking on lung cancer: a case-control study in Southeast ChinaThe detecting results of serum Cpn IgG and IgA by MIF method under the microscope (× 400 times. a: IgG positive control; b: IgG negative control; c: IgG positive specimens; d: IgA positive control; e: IgA negative control; f: IgA positive)Back to article page