Phase-rectified signal averaging as a sensitive index of autonomic changes with aging.
Campana
L M
LM
Boston University, Department of Biomedical Engineering, and Brigham and Women's Hospital, 44 Cummington St., Boston, MA 02215, USA. lcampana@bu.edu
Owens
R L
RL
Clifford
G D
GD
Pittman
S D
SD
Malhotra
A
A