Comparative study between transumbilical sing-port laparoscopic cholecystectomy and conventional laparoscopic cholecystectomy
YANG Feng, MO Li-xian, TANG Guang-song, et al
上海交通大学学报（医学版） . 2013, (12): 1634 .  DOI: 10.3969/j.issn.1674-8115.2013.12.017