“…A total of 1985 women in the LESS group and 2466 women in the conventional hysterectomy were included in six randomized controlled trials [23, 24, 26, 30, 39, 41], five prospective cohort studies [21, 27, 32, 36, 37], and 12 retrospective cohort studies [13, 20, 22, 25, 28, 29, 31, 33–35, 38, 40]. Twenty of the studies (86.9%) were performed in Asia (fifteen in Korea [13, 23–25, 27, 28, 31, 32, 34–39, 41], one in China [26], two in Japan [29, 40], and two in Taiwan [30, 33]), and the other three studies originated from the United States [20], Italy [22], and France [21]. Fourteen studies had a single center design [20–24, 26–30, 33, 36, 37, 39], one RCT was multi-center, and in the other eight studies, the setting was unclear [13, 25, 31, 32, 34, 35, 38, 40].…”