1. Institute of Biochemistry II, Jena University Hospital, Friedrich-Schiller-University Jena; Nonnenplan 2-4 07743 Jena Germany
2. Institute of Laboratory Medicine and Pathobiochemistry, Charité-Universitätsmedizin Berlin; Hindenburgdamm 30 12200 Berlin Germany
3. Naxospharma srl; Via G. di Vittorio 70 20026 Novate Milanese Italy