[1] Klinikum Nord, Zentrallab, Hamburg, Germany
[2] SW Washington Med Ctr, Vancouver, WA USA
[3] Roche Diagnost Corp, Indianapolis, IN USA
[4] Univ Alberta Hosp, Edmonton, AB T6G 2B7, Canada
[5] Univ Santiago de Compostela, Fac Med, Inst Serv Med Legal Toxicol Forense, Santiago De Compostela, Galicia, Spain
[6] Univ Kliniken, Kantonsspital Basel, Dept Clin Chem, Basel, Switzerland
[7] Roche Diagnost GmbH, Mannheim, Germany