Genomics and Metagenomics of Asthma Severity

Inclusion Criteria: * Male or female aged older or equal than 8 years and younger or equal than 85 years * Physician diagnosis of asthma according to the Global Initiative for Asthma (GINA) guidelines * Treated on GINA step 1-5 Exclusion Criteria: * One or more grandparents of non-European origin * Pregnancy * Coexistence of other chronic pulmonary disorders including cystic fibrosis, chronic obstructive pulmonary disease (emphysema or chronic bronchitis), or congenital disorders of the lungs or airways * Known family relatedness (first or second degree) with another participant already included in the study