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First-trimester screening for spontaneous preterm delivery with maternal characteristics and cervical length.
Greco E, Gupta R, Syngelaki A, Poon LC, Nicolaides KH.
Fetal Diagn Ther 2012;31:154-61. -
Prediction of spontaneous preterm delivery from endocervical length at 11 to 13 weeks.
Greco E, Lange A, Ushakov F, Calvo JR, Nicolaides KH.
Prenat Diagn 2011;31:84-9.