共 18 条
[2]
ELMROOS T, 1976, THESIS UMEA U
[4]
FALK V, 1965, ACTA OBSTET GYNEC S6, V44
[7]
Landgren B M, 1971, Lakartidningen, V68, P4897
[8]
LEDGER W J, 1974, Clinical Obstetrics and Gynecology, V17, P79, DOI 10.1097/00003081-197403000-00010