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With the new Grey Sloan Memorial Hospital up and running smoothly, everyone is happy about the new changes. Meredith worries about the health of her baby while Bailey tries to get the board members to fund her new plan for genome mapping. Meanwhile, Arizona's new prosthetic gives her the confidence to reignite her relationship with Callie. With the help of a patient, Alex pulls some pranks on Jo's new boyfriend and Cristina tries to get involved in groundbreaking cardio research.