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Morphometric measurements of alveolar structures and cellular analyses. (A) Measurement of microvessel diameter, d =182 µm; (B) measurement of alveolar mouth diameter, d =326.8 µm, mouth fibre thickness (arrow) =5.5 µm; (C) counting of cells in one field, n=25; (D) counting of non-alveolar-mouth fibres in one quadrant of the field, n=11.
