Just over two years http://cnpcl.com/stmap_42qktlqx.html?methotrexate.toprol.levitra.coreg how much does metronidazole gel cost LONDON, Aug 6 (Reuters) - Three big-name bidders for RioTinto's majority stake in Canada's largest iron oreproducer are now out of the running, sources familiar with thetalks said on Tuesday, after offers came in well below themining group's targets.