[1] Univ Calif Los Angeles, David Geffen Sch Med, VA Greater Los Angeles Healthcare Syst, 900 Vet Ave,24-130 Warren Hall, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, Div Endocrinol Diabet & Hypertens, Dept Med, 900 Vet Ave,24-130 Warren Hall, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Vet Affairs Greater Los Angeles Healthcare Syst, 11301 Wilshire Blvd, Los Angeles, CA 90073 USA
[4] Univ Calif Los Angeles, David Geffen Sch Med, Div Endocrinol, Dept Med, 11301 Wilshire Blvd, Los Angeles, CA 90073 USA
[5] Univ Calif Los Angeles, David Geffen Sch Med, Dept Physiol, 11301 Wilshire Blvd, Los Angeles, CA 90073 USA