Parentally reported prevalence. Venn diagram showing overlap between presence (%) of possible asthma, rhinitis, eczema and food allergy in children 1–6 years old attending ordinary day-care centres. Percentages refer to crude number of children with criterion or criteria combinations in relation to total ordinary day-care study population.
Bröms et al. BMC Public Health 2013 13:764 doi:10.1186/1471-2458-13-764