Design of the Association of Uterine Perforation and Expulsion of Intrauterine Device study: a multisite retrospective cohort study

Mary S. Anthony, Susan D. Reed, Mary Anne Armstrong, Darios Getahun, Jennifer Gatz, Catherine W. Saltus, Xiaolei Zhou, Juliane Schoendorf, Debbie Postlethwaite, Tina Raine‐Bennett, Michael J. Fassett, Jeffrey F. Peipert, Mary E. Ritchey, Laura Ichikawa, R. Lynen, Amy Alabaster, Maqdooda Merchant, Vicki Y. Chiu, Jiaxiao Shi, Fagen Xie, Siu L. Hui, Jinyi Wang, Shannon Hunter, Jennifer Bartsch, Ann-Kathrin Frenz, Giulia Chillemi, Theresa M. Im, Harpreet S. Takhar, Alex Asiimwe