KV Pharmaceutical Co. (KV/A) (A) must face an investor lawsuit claiming the company and its executives made misleading statements about its compliance with federal quality- control standards, a U.S. appeals court ruled. Led by public employee pension plans of Boston and Norfolk County, Massachusetts, investors sued the Bridgeton, Missouri- based drugmaker in 2008, alleging it and top executives made misleading statements about compliance with U.S. quality-control regulations.