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The authors report that both hyperoxia and pressure contributed, without a consistent pattern.\nexposure: 97.9% oxygen at 2.4 ATA for 90 minutes, with hyperbaric normoxia as a pressure control\nevidence_span: {\"source_cache\": \"artifacts/hbot-research/23770209.abstract.txt\", \"locator\": \"Indexed abstract; zero-based, end-exclusive Unicode character offsets\", \"file_sha256\": \"1621131d902e359cb8c23a51c1d76596ddff036697818a1613e68b26095eed8a\", \"start_char\": 0, \"end_char\": 1709, \"text_sha256\": \"1621131d902e359cb8c23a51c1d76596ddff036697818a1613e68b26095eed8a\"}\n[hbot-p23770209] Effects of hyperbaric oxygen treatment on antimicrobial function and apoptosis of differentiated HL-60 (neutrophil-like) cells. 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