TSLP and asthma: To investigate the clinical relevance of the proposed model of TSLP-driven eosinophilic responses via CCL11/eotaxin-1 secretion in the asthmatic airways, we conducted a clinical study to see if virally-induced asthma exacerbations are associated with in vivo airway secretion of TSLP and CCL11/eotaxin-1.