Buccal swab
asthma
ASTHMATIC, MINOR, ASTHMA
Isohelix Buccal swabs with RapiDri™ pouch will be used to sample buccal cells for isolating DNA at the baseline visit. The extracted DNA is used to study gene polymorphisms in selected candidate genes. The inclusion of genes for SNP analysis is based on the following criteria: association with asthma based on biomedical literature, a functional difference between the variant allele and the wild-type allele, and a minor allele frequency of at least 5% in the (asthmatic) population.