Figure 4

Serum heme oxygenase (HO)-1 according to progression and non-progression of honeycombing and ground glass opacity (GGO) lesions. The baseline serum HO-1 with honeycomb progression ( +) group was higher than that with honeycomb progression ( −) group. On the other hand, there was no significant difference between serum HO-1 with GGO progression ( +) and progression ( −) groups.