1. Department of Biochemistry, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612, U.S.A.
2. Department of Orthopedic Surgery, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612, U.S.A.
3. Institute of Anatomy, Histology and Embryology, University Medical School of Debrecen, Hungary
4. Department of Internal Medicine 3, University Medical School of Debrecen, Hungary
5. Department of Biology, University Medical School of Pecs, Hungary