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Total cost components for intervention and EUC. Notes: AP1, apportioning 1; AP2, apportioning 2; AP3, apportioning 3. See Box S1 for details on apportioning rules. Tracer service = specialist nurse-led service. Notice that the second arrow connecting the tracer service to the intervention was not apportioned, as it corresponded to the patient-level consultations delivered by the service. EUC, enhanced usual care.
