Michael W Weiner, Juan M. Górriz, Javier Ramírez and Isabella Castiglioni Pages 466 - 468 ( 3 )
University of California, San Francisco, San Francisco VA Medical Center 4150 Clement Street (114M) San Francisco CA, 94121 USA., Dept. Signal Theory Networking and Communications Fuentenueva s/n 18071 University of Granada Spain., , Institute of Molecular Bioimaging and Physiology – National Research Council Italy.