1. Division of General Surgery, Department of Surgery, Albany Medical College , 50 New Scotland Ave., MC-193, Albany, NY 12208 , USA
2. Division of Metabolism, Endocrinology, and Diabetes, Department of Internal Medicine, University of Michigan , 2800 Plymouth Road, Bldg. 16, Rm 453S, Ann Arbor, MI 48109 , USA
3. Section of Endocrine Surgery, Department of Surgery, University of California, San Francisco , 513 Parnassus Ave. Ste. S320, Box 0104, San Francisco, CA 94143 , USA