Fig. 4

Relationship between PMN influx in vivo and lung fibrotic histopathology score following exposure to α-quartz. The α-quartz used in the source studies was Min-U-sil® 5. Blue dots are data entries where the PMN influx was recorded following a period of post-exposure conditioning (36 days), whereas red dots represent PMN influx values collected with no post-exposure conditioning time (< 48 h). Data points given are mean fibrotic score ± SEM (N = 5–6) [27, 28, 32, 40]