1. Center for Medical Biochemistry, Clinical Center of Serbia , Višegradska 26 , 11000 Belgrade , Serbia , Phone/Fax: +381 11 361 56 31
2. Department for Medical Biochemistry, Faculty of Pharmacy , University of Belgrade , Belgrade , Serbia , E-mail:
3. Department for Laboratory Medicine, Faculty of Pharmacy , Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun , Bydgoszcz , Poland
4. c/o European Federation of Clinical Chemistry and Laboratory Medicine , Milan , Italy