1. Department of Chemical Pathology, Princess Alexandra Hospital, Ipswich Rd., Woolloongabba, Queensland 4102, Australia
2. Department of Laboratory Medicine, Children’s Hospital and Harvard Medical School, Boston, MA 02115
3. Institute of Medical Genetics, University of Oslo and Ullevål University Hospital, N-0315 Oslo, Norway
4. Service de Biochimie, Tenon Hospital, F-75970 Paris, France
5. Scientific Affairs Chemistry, Dade Behring, Inc., D-35001 Marburg, Germany
6. Institute for Medical Biochemistry, University of Graz, A-8010 Graz, Austria
7. Department of Clinical Laboratory, Omiya Medical Center, Jichi Medical School, Saitama 330-0834, Japan
8. Center for Internal Medicine, University of Marburg, D-35001 Marburg, Germany