Retesting for severe acute respiratory coronavirus virus 2 (SARS-CoV-2): Patterns of testing from a large US healthcare system. (10th August 2021) - Kennedy, Amy J.; Hilmes, Mary K.; Waddell, Linda; Bartow, Alexandrea B.; Baxter, Carla M.; Hadi, Christiane M.; Snyder, Graham M.; Merlin, Jessica S.