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Comparison of candesartan, enalapril, and their combination in congestive heart failure: randomized evaluation of strategies for left ventricular dysfunction (RESOLVD) pilot study. The RESOLVD Pilot Study Investigators. Circulation 1999; 100: 1056-64.","DOI":"10.1161\/01.CIR.100.10.1056"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11. Imamura T, Kinugawa K, Hatano M, <i>et al<\/i>. Preoperative beta-blocker treatment is a key for deciding left ventricular assist device implantation strategy as a bridge to recovery. J Artif Organs 2014; 17: 23-32.","DOI":"10.1007\/s10047-013-0748-7"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Borg GA. Psychophysical bases of perceived exertion. Med Sci Sports Exerc 1982; 14: 377-81.","DOI":"10.1249\/00005768-198205000-00012"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Slaughter MS, Pagani FD, Rogers JG, <i>et al<\/i>. 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