IL1B and chronic obstructive pulmonary disease: Our finding of the positive correlation between mRNA expression of TSLP and IL-1β in moDCs alone of control and COPD subjects, as well as even a stronger relationship in moDCs after co-cultivation with epithelium and moMφs in COPD seems to confirm the results of Elder at al. who highlighted the link between TSLP and IL-1β [11,16].