CSF2 and asthma: Several studies in asthma have reported raised concentrations of factors in the airways that have the potential to chemoattract neutrophils and inhibit their apoptosis including, interleukin (IL)-8 [3], [7], IL-6 [8],[9],[10], granulocyte-macrophage colony-stimulating-factor (GM-CSF) [8], [9] and tumour necrosis factor (TNF)-α [11], [12].