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Waldo A, Camm A, deRuyter H, Friedman P, MacNeil D, Pauls J, Pitt B, Pratt C, Schwartz P, Veltri E (1996). «Effect of d-sotalol on mortality in patients with left ventricular dysfunction after recent and remote myocardial infarction. The SWORD Investigators. Survival With Oral d-Sotalol». Lancet348 (9019): 7-12. PMID8691967. doi:10.1016/S0140-6736(96)02149-6.