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