Risk of placenta previa in assisted reproductive technology: A Nordic population study with sibling analyses. - Landsverk E; Westvik-Johari K; Wennerholm UB; Bergh C; Kyhl F; Spangmose AL; Vassard D; Pinborg A; Rönö K; Gissler M; Petersen SH; Opdahl S (PLoS medicine, 2025)