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(a) Lowess calibration curve, Deyo-Charlson Index, 3-day readmission; (b) Lowess calibration curve, Elixhauser Index, 3-day readmission; (c) Lowess calibration curve, CMS Tiers, 3-day readmission; (d) Lowess calibration curve, Deyo-Charlson Index, 30-day readmission; (e) Lowess calibration curve, Elixhauser Index, 30-day readmission; (f) Lowess calibration curve, CMS Tiers, 30-day readmission.
