[1] Univ Calif Los Angeles, David Geffen Sch Med, Dept Surg, Sect Endocrine Surg, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Med, Div Endocrinol Diabet & Metab, Los Angeles, CA 90024 USA
[3] VA Greater Los Angeles Healthcare Syst, Div Endocrinol Diabet & Metab, Dept Med, Los Angeles, CA USA