Walgreens (WBA) formally ended its relationship with Theranos...saying it will close all the care centers run by the blood-testing company. Controversy surrounding Theranos and its CEO, Elizabeth Holmes, started last year after reports suggested that its blood-testing device did not provide accurate results. Walgreens said in a statement that is was in the best interest for the customers to terminate the partnership. The decision comes after a number of test results were voided and the Centers for Medicare and Medicaid Services (CMS) rejected Theranos' plan of corrections. In a statement, Theranos said it was disappointed that Walgreen's had chosen to end the relationship, adding that it is working closely with government officials to ensure they comply with all federal regulations.