(Reuters)—The U.S. Food and Drug Administration on Friday approved Amgen Inc.’s biosimilar copy of Johnson & Johnson’s blockbuster rheumatoid arthritis drug, Remicade (infliximab), according to the regulator’s website. The biosimilar, Avsola (infliximab-axxq), has the same chemical components, dosage form and strength as Remicade and would treat a range of autoimmune disorders. The label for the…