WNT5A expression in airway epithelial brushings of asthmatics, correlated to fractional exhaled nitric oxide (FeNO) and then stratified into different asthma phenotypes, showed that atopic individuals with an early disease onset and high percentage of bronchoalveolar lavage (BAL) lymphocytes have strongly elevated levels of WNT5B compared to other phenotypes51. Here, WNT5B is linked to asthma.