Protocol for a pragmatic stepped wedge cluster randomized clinical trial testing behavioral economic implementation strategies to increase supplemental breast MRI screening among patients with extremely dense breasts. - McCarthy, Anne Marie; Fernandez Perez, Claudia; Beidas, Rinad S.; Bekelman, Justin E.; Blumenthal, Daniel; Mack, Elizabeth; Bauer, Anna-Marika; Ehsan, Sarah; Conant, Emily F.; Wheeler, Bernadette C.; Guerra, Carmen E.; Nunes, Linda W.; et al. (Implementation Science, 2023)