The group purchasing organization Premier and 11 leading health systems have invested a small stake in specialty drug maker Exela Pharma Sciences to ensure the supply of essential drugs that face possible shortages due to sourcing problems spurred by the COVID-19 pandemic. The participating health systems are expected to secure an uninterrupted supply of 19 pharmaceutical products, including generic injectables that often appear on the FDA drug shortage list and 503B compounded pharmaceutical products provided by Exela, which primarily sources...