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Association between immunosuppression exposure and age-adjusted leukocyte telomere length percentile as a continuous variable for fHP and uILD patients. Weighted Cox proportional hazards regression model with robust variance estimation and adjustment for non-IPF ILD diagnosis, radiographic honeycombing, and centre. Abbreviations: LTL, leukocyte telomere length; IS, immunosuppression; CI, confidence interval.
