(Reuters)—Sanofi and Regeneron Pharmaceuticals Inc. have expanded a clinical trial of their rheumatoid arthritis drug Kevzara (sarilumab) as a coronavirus treatment to patients outside the U.S. The companies said enrolments for the mid-to-late stage trial of sarilumab, an immune-system modifying drug known as a monoclonal antibody, have now started in Italy, Spain, Germany, France, Canada…