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Nitric oxide release from catheters (0% DACA-6 and 0% borate, 5% DACA-6 and 0% borate, and 15% DACA-6 and 0% borate) as measured by chemiluminescence. Catheter samples were bathed in a chelex-treated phosphate-buffered saline (pH 7.34, 37°C) medium. NO released was measured with a nitric oxide analyzer.
