S100A8 and asthma: Epithelial expression of S100A7 and S100A8 pre-BT negatively correlated with ACCS score (r = − 0.6; p-value = 0.03 and r = − 0.7; p-value = 0.006 respectively) suggesting that higher expression of these proteins might indicate a poorer asthma control (Additional file 6: Fig. S3B).