The diagnostic value of vaginal ultrasound for tubal pregnancy and the comparison between methotrexate and laparoscopy
LI Hong-mei, SHI Shao-feng, XIAO Xian-jing
Journal of Hebei Medical University . 2022, (11): 1302 -1305 .  DOI: 10.3969/j.issn.1007-3205.2022.11.013