1. Department of Clinical Chemistry and Laboratory Medicine , Leiden University Medical Center , P.O. Box 9600 , 2300 RC Leiden , The Netherlands
2. Department of Clinical Chemistry and Laboratory Medicine , Leiden University Medical Center , Leiden , The Netherlands
3. University of Reims Champagne-Ardenne, Faculty of Medicine, UMR CNRS/URCA n° 7369, and University Hospital of Reims , Department of Biochemistry , Reims , France