samples will be processed and divided into two categories: eosinophilic (% eosinophils >2.5%) and non-eosinophilic (<2.5% eosinophils). The two categories of asthmatics will be used to categorize asthmatics for comparison on parameters such as SnIII analysis of SF6, LCI etc. In addition, % eosinophilia will be considered as a continuous measure in those with % eosinophils > 2% and correlated with LCI.