[1] Baylor Coll Med, Dept Med, Sect Cardiovasc Res, Houston, TX USA
[2] Creighton Univ, Gastroenterol & Hepatol, Phoenix, AZ USA
[3] Univ Colorado Anschutz Med Campus, Div Endocrinol Metab & Diabet, Div Cardiol, Aurora, CO USA
[4] Pinnacle Clin Res, San Antonio, TX USA
[5] Univ Florida, Div Endocrinol Diabet & Metab, 1600 SW Archer Rd,Room H-2, Gainesville, FL 32610 USA