Development and validation of an artificial intelligence assisted prenatal ultrasonography screening system for trainees. - Lei T; Feng JL; Lin MF; Xie BH; Zhou Q; Wang N; Zheng Q; Yang YD; Guo HM; Xie HN (International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics, 2024)