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In the version of this article originally published, the author affiliations were incorrectly stated. The addresses should have been: Department of Cardiology, S. Luca Hospital, IRCCS, Istituto Auxologico Italiano, Piazza Brescia 20, Milan 20149, Italy (G. Parati, J. E. Ochoa, C. Lombardi, G. Bilo). University of Milano-Bicocca, Via Cador 48, Monza 20900, Italy (G. Parati, J. E. Ochoa). This error has been corrected in the HTML and PDF versions of the article.