海量图书期刊资源，随时随地畅享阅读乐趣
The implementation of first-trimester scanning at 10–13 weeks' gestation and the measurement of fetal nuchal translucency thickness in two maternity unitsP. P. Pandya; H. Goldberg; B. Walton; A. Riddle; S. Shelley; R. J. M. Snijders; Professor K. H. Nicolaides · 1995