This randomized , multicenter , prospective trial , called the Long Drug-Eluting Stent ( LONG-DES ) V trial , compared the biodegradable polymer-based biolimus A9-eluting stent ( BES ) and the durable polymer-based platinum chromium everolimus-eluting stent ( PtCr-EES ) in 500 patients with long ( 25 mm ) coronary lesions .