Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, Regensburg, Germany

Correspondence to Sonja C. Stadler, PhD, Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, Franz-Josef-Strauss Allee 11, 93053 Regensburg, Germany. Tel: +49 941 9446201; fax: +49 941 9446202; e-mail: [email protected]