[1] Fdn G Monasterio CNR Reg Toscana, CMR Unit, Pisa, Italy
[2] CNR, Inst Clin Physiol, I-56100 Pisa, Italy
[3] Childrens Hosp Los Angeles, Dept Pediat, Div Cardiol, Los Angeles, CA 90027 USA
[4] FerroKin BioSci Inc, Wayne, PA USA
[5] Childrens Hosp Los Angeles, Dept Radiol, Los Angeles, CA 90027 USA