1. Department of Physiology and Biophysics (H.H.C.), University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205;
2. Center for Bone and Arthritis Research at Institute of Medicine (P.H., U.H.L.), Sahlgrenska Academy at University of Gothenburg, S-405 30 Gothenburg, Sweden;
3. Department of Molecular Periodontology (U.H.L.), Umeå University, SE-901 87 Umeå, Sweden