Detection of allergen-symptoms relationships
For detecting significant literature co-mentions between allergens and pathological terms, we followed a procedure similar to that described[20]. Being na the number of articles mentioning a given allergen,ns number of articles mentioning a given clinical sign, b those mentioning both together (the intersection between the two sets of articles) and P the whole size of the PubMed database (~36 million entries), we calculated the fraction of papers mentioning the term of lowest frequency that mentions both: