@article{articlea0d8168b,
title   = {Reference range for the pulsatility index ductus venosus Doppler measurement between 11 and 13+6 weeks of gestation in a brazilian population},
author = {Peixoto, Alberto Borges and Caldas, Taciana Mara Rodrigues da Cunha and Martins, Wellington de Paula and Ferreira, Polyana Costa and Nardozza, Luciano Marcondes Machado and Costa, Fabricio da Silva and Araujo Júnior, Edward},
year = {2016},
doi = {10.3109/14767058.2015.1103730},
journal   = {The Journal of Maternal-Fetal and Neonatal Medicine}
}