Learning curve for Doppler measurement of fetal modified myocardial performance index.
Cruz-Martinez
R
R
Department of Maternal-Fetal Medicine, University of Barcelona, Barcelona, Spain.
Figueras
F
F
Jaramillo
J J
JJ
Meler
E
E
Méndez
A
A
Hernandez-Andrade
E
E
Gratacos
E
E