Paolo Castiglioni (Ph.D. in Biomedical Engineering, 1993) is the research coordinator of the Biosignal Analysis Area at the Department of Biomedical Technology in IRCCS Fondazione Don Carlo Gnocchi (Milan, Italy). His current research interests include the analysis of biological signals, in particular, complexity analysis of the cardiovascular time series; the study of the physiological mechanisms for the cardiovascular control and of the alterations induced by hypertension, diabetes or sodium sensitivity; gravitational physiology; and rehabilitation medicine in cardiology.