The diagnostic efficacy of ultrasound scoring method, combined with human chorionic gonadotropin β, alpha-fetoprotein, and creatine kinase on dangerous placenta previa combined with placenta implantation
JI Li, ZHANG Xue-fang, ZHAI Xing-rong
Journal of Hebei Medical University . 2023, (7): 851 -855 .  DOI: 10.3969/j.issn.1007-3205.2023.07.020