Comparison of serum markers in first-trimester Down syndrome screening

Jacob A. Canick, Geralyn M. Lambert-Messerlian, Glenn E. Palomaki, Louis M. Neveux, Fergal D. Malone, Robert H. Ball, David A. Nyberg, Christine H. Comstock, Radek Bukowski, George R. Saade, Richard L. Berkowitz, Pe'er Dar, Lorraine Dugoff, Sabrina D. Craigo, Ilan E. Timor-Tritsch, Stephen R. Carr, Honor M. Wolfe, Mary E. D'Alton