Tender For bid to ras corrigendum : supply of quality control reagents d d - immuno assay control trilevel assayed lypholisedorliquistable , clinical chemistry control level2 assayed lypholisedor liquistable , clinical chemistry control level 3assayedlypholised or liquistable , urine control liquid stable level 1 , urine control liquid stable level 2 , cardiac markers plus tri level liquistable