Figure 3From: Sensitization to airborne allergens among adults and its impact on allergic symptoms: a population survey in northern VietnamProportional Venn diagram. a) A proportional Venn diagram has been used to quantify the distribution of subjects with a positive SPT to cockroach, any mite, and any animal in the whole population sample. b) A proportional Venn diagram has been used to quantify the distribution of subjects with a positive SPT to B. tropicalis, D. pteronyssinus and D. farinae in the whole population sample.Back to article page