[1] NIH, Dept Radiol & Imaging Sci, Ctr Clin, 9000 Rockville Pike,Bldg 10,Room IC455, Bethesda, MD 20892 USA
[2] NIH, Natl Inst Dent & Craniofacial Res, Skeletal Disorders & Mineral Homeo Stasis Sect, 30 Convent Dr,Bldg 30,Room 228 MSC 4320, Bethesda, MD 20892 USA
[3] Univ Queensland, Ochsner Clin Sch, Fac Med, New Orleans, LA 70121 USA
[4] Geisel Sch Med Dartmouth, Hanover, NH 03755 USA
[5] Sahlgrens Univ Hosp, Dept Clin Physiol, Gothenburg, Sweden
[6] Univ Maryland Baltimore Cty, Dept Comp Sci & Elect Engn, Baltimore, MD USA
[7] Univ Penn, Perelman Sch Med, Dept Radiol, Philadelphia, PA USA