Erratum to “Effect of extended oral contraception use on the prevalence of fetal trisomy 21 in women aged at least 35 years”: [Int J Gynecol Obstet 138(2017) 261–266]
Dániel Horányi; Lilla Éva Babay; János Rigó; Balázs Győrffy; Gyula R. Nagy
Author Information: Department of Obstetrics and Gynecology
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