Deerfield, Ill. — In its fiscal 2020 third-quarter results, Walgreens Boots Alliance Inc. said its performance was “significantly impacted by the COVID-19 pandemic,” causing sales to be roughly $700 million to $750 million lower. The decline is largely attributed to its international stores. In April, sales at Walgreens stores in the United Kingdom were down 85%. Deerfield-based Walgreens says that pharmacy volume was impacted globally by a drop in doctor visits and hospital patient admissions. Profits were also hurt by a shift to low-margin items and higher supply chain and …