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The magic sextet of clinical researchDOI: 10.1590/S0102-76382009000200004 Braz J Cardiovasc Surg. 2009;24(2):113-115 How to cite this articlePitta GBB, Roque FP, Pitta MR. The magic sextet of clinical research. Braz J Cardiovasc Surg. 2009;24(2):113-115 |