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Brignole M, Menozzi C, Moya A, Andresen D, Blanc JJ, Krahn AD, Wieling W, Beiras X, Deharo JC, Russo V, Tomaino M, Sutton R; International Study on Syncope of Uncertain Etiology 3 (ISSUE-3) Investigators.Brignole M, et al.Circulation. 2012 May 29;125(21):2566-71. doi: 10.1161/CIRCULATIONAHA.111.082313. Epub 2012 May 7.Circulation. 2012.PMID: 22565936Clinical Trial.