Table 4. Grading of lung fibrosis.

	Control	Early  bleomycin+saline	Early bleomycin+montelukast	Late  bleomycin+saline	Late bleomycin+montelukast
	Mean±SD	Mean±SD	Mean±SD	Mean±SD	Mean±SD
Fibrosis score	0.0	1.9±0.9*†	1.4±0.5**‡	5.6±1.1*	4.3±0.5*§
* p<0.001, ** p<0.01 vs control group; § p<0.01 vs B (Bleomycin) + saline group in same term; † p<0.001 vs late B (Bleomycin) + saline group; ‡ p<0.001 vs late B (bleomycin) + M (Montelukast) group; Data are means ± standard deviations from 8 rats for each group.