Table 1.

Lung injury scores described by Kristof scoring system

	Cellularity	Protein exudation	Hemorrhage	Total score
Control	1.3 ± 0.58	0.66 ± 0.44	0.84 ± 0.36	2.9 ± 0.97
PP	7.4 ± 1.4***	4.8 ± 1.2***	1.4 ± 0.9	14 ± 1.4***
PP-ABH	3.4 ± 1.1*, *****	2.1 ± 0.93****	0.9 ± 0.43	6 ± 1.4**, *****

^*P <0.05, ^**P <0.01, ^***P <0.001 compared with the control group

^****P <0.01, ^*****P <0.001 compared with the PP group