1. Genzyme Corporation (T.K. S., S.M., N.B., A.B.), Framingham, Massachusetts 01701
2. Laboratory for Mineralized Tissues (P.S., N.D., V.K., A.T., S.V.), Medical School, University of Zagreb,HR-10000 Zagreb, Croatia
3. Faculty of Mechanical Engineering and Naval Architecture (D.S.), HR-10000 Zagreb, Croatia
4. Faculty of Food Technology and Biotechnology (M.B.), HR-10000 Zagreb, Croatia