Short-term simulation training course improves basic obstetric ultrasound operational skills of residents: A multi-center study. - Zhao, Yongfeng; Zhou, Ping; Tang, Xiaohong; Zhu, Wenhui; Liu, Wengang; Zhou, Jinguang; Wang, Jie; Luo, Yingchun; Zhang, Junhui; Yang, Lan; Xu, Yan (PLoS ONE, 2025)