共 10 条
[1]
BELFRAGE P, 1987, OBSTET GYNECOL, V69, P747
[7]
KARLBERG P, 1979, NORMAL RANGE CURVES
[9]
WALDENSTROM U, 1988, LANCET, V2, P585
[10]
WALDENSTROM U, 1990, OBSTET GYNECOL, V76, P336