Affiliation: | (1) Present address: Department of Microbiology and Molecular Genetics, University of Vermont, Burlington, Vermont, USA;(2) Present address: Department of Orthopaedic Surgery, University of Iowa, Iowa City, Iowa, USA;(3) Bone Research Branch, National Institute of Dental Research, National Institutes of Health, Building 30/106, 20892 Bethesda, MD, USA |