TY - JOUR TI - Longitudinal reference range for umbilical cord cross-sectional area in twin pregnancies at 18–32 weeks of gestation PY - 2015 AU - Fernandes, D. B. AU - Liao, Adolfo W. AU - Brizot, Maria de L. AU - Francisco, Rossana P. Vieira AU - Zagaib, Marcelo T2 - Prenatal Diagnosis DO - 10.1002/pd.4566 UR - http://onlinelibrary.wiley.com/doi/10.1002/pd.4566/epdf PP - Chichester VL - 35 SP - 500-505 ER -