[1] Harvard Univ, Vet Affairs Boston Healthcare Syst, Sch Med, Urol Sect, Boston, MA 02130 USA
[2] Harvard Univ, Vet Affairs Boston Healthcare Syst, Sch Med, Endocrinol Sect, Boston, MA 02130 USA
[3] Brigham & Womens Hosp, Endocrinol Diabet & Hypertens Div, Boston, MA 02115 USA
[4] New England Res Inst, Watertown, MA 02172 USA