[1] Hosp Special Surg, Mineralized Tissue Div, New York, NY 10021 USA
[2] Ludwig Boltzmann Inst Osteol es, Hanusch Krankenhaus WGKK, Vienna, Austria
[3] Unfallkrankenhaus Meidling AUVA4, Med Abt, Vienna, Austria
[4] Columbia Univ, Coll Phys & Surg, New York, NY USA
[5] Univ Athens, Sch Med, GR-11527 Athens, Greece
[6] Rutgers State Univ, Dept Chem, Newark, NJ 07102 USA