Table 1. Characterization of AT, endothelial cell, and macrophage densities in deficient surfactant (DS) and normal surfactant (NS) LoCs.

Surfactant	Cell type	Cell density×104/ mm2
DS	AT	23.5±3.9
NS	AT	26.4±6
DS	Macrophage	3.3±1.5
NS	Macrophage	3.2±1.5
n/a	Endothelial	13.6±3.7