Maternal serum placental protein 13 at eleven to thirteen weeks in chromosomally abnormal pregnancies.
Akolekar
Ranjit
R
Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK.
Pérez Penco
José María
JM
Skyfta
Evdoxia
E
Rodríguez Calvo
Jesús
J
Nicolaides
Kypros H
KH