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A, Overall time to development of bronchiolitis obliterans syndrome (BOS). Ninety-five percent confidence limits are represented by the thin lines. B, Overall time to development of BOS, stratified by time groups. Early transplant (group 1) had a statistically significant reduced freedom from BOS at all time points compared to late transplant (group 2; P<.0001). Ninety-five percent confidence limits are represented by the thin lines.
