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Flowchart of the study design. This is a randomized, double‐blind, active‐controlled, multicenter phase 3 trial to evaluate the safety and efficacy of telmisartan/amlodipine/chlorthalidone triple combination treatment in patients with primary hypertension inappropriately controlled on telmisartan/amlodipine dual combination treatment. TEL/AML/CHTD, telmisartan/amlodipine/chlorthalidone; TEL/AML, telmisartan/amlodipine.
