Author/Editor		Tul, N; Spencer, K; Nicolaides, KN
Title		Screening for trisomy 18 and 13 by combination of ultrasound and biochemical markers in the 1st trimester
Type		članek
Source		Ultrasound Obstet Gynecol
Vol. and No.		Letnik 12, št. Suppl 1
Publication year		1998
Volume		str. 142
Language		eng