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Morphology and annexin V-FITC/PI staining pattern of apoptotic cells. (a) In the no-treatment group, the intact pneumocytes were neither stained with annexin V-FITC nor PI, whereas the apoptotic pneumocytes were stained with annexin V-FITC with or without PI as shown in (b) CPT, (c) HZ, and (d) HZ with the THP-1 supernatant-treated group. (A color version of this figure is available in the online journal.)
