共 5 条
[4]
False-positive serum human chorionic gonadotropin results: Causes, characteristics, and recognition[J] . Glenn D. Braunstein.American Journal of Obstetrics and Gynecology . 2002 (1)
[5]
Images, imagination and ideas: A perspective on the impact of ultrasonography on the practice of obstetrics and gynecology[J] . Ronald V. Wade.American Journal of Obstetrics and Gynecology . 1999 (2)