Apple Fred S, Morrow David, Zaugg Christian, Hickey David, Zaharik Michelle, Blackwood John J, Jakobsen Kirsten
Hennepin County Medical Center, Minneapolis, MN 55415, USA.
Clin Chem. 2012 Jan;58(1):31-8. doi: 10.1373/clinchem.2011.165860. Epub 2011 Nov 17.