[1] Columbia Univ Coll Phys & Surg, New York, NY 10032 USA
[2] Fed Univ Parana, Hosp Clin, Parana, Brazil
[3] NIH, Bethesda, MD 20892 USA
[4] SW Fdn Biomed Res, Dept Genet, San Antonio, TX USA
[5] St Joseph Hosp, Maine Ctr Osteoporosis Res & Educ, Bangor, ME USA