TY - RPRT T1 - Annual Report 2012. External quality assessment. Trace elements in urine. Y1 - 2013 A1 - Bernard China A1 - P. Coucke A1 - Mohamed Rida Soumali KW - 2012 KW - annual report KW - assessment KW - external KW - External quality assessment PB - ISP CY - Bruxelles SN - 2294-3471 U1 - 38593 ER -