TY - JOUR T1 - Nonlinear digital signal processing in mental health: characterization of major depression using instantaneous entropy measures of heartbeat dynamics JF - Frontiers in physiology Y1 - 2015 A1 - G. Valenza A1 - R. G. Garcia A1 - L. Citi A1 - E. P. Scilingo A1 - C. A. Tomaz A1 - R. Barbieri KW - Bioengineering VL - 6 ER -