Authors:
Cicero, S
Curcio, P
Papageorghiou, A
Sonek, J
Nicolaides, K
Citation: S. Cicero et al., Absence of nasal bone in fetuses with trisomy 21 at 11-14 weeks of gestation: an observational study, LANCET, 358(9294), 2001, pp. 1665-1667
Authors:
Hallahan, T
Krantz, D
Orlandi, F
Rossi, C
Curcio, P
Macri, S
Larsen, J
Buchanan, P
Macri, J
Citation: T. Hallahan et al., First trimester biochemical screening for Down syndrome: free beta hCG versus intact hCG, PRENAT DIAG, 20(10), 2000, pp. 785-789