Section of Endocrinology, Diabetes and Metabolism, Lewis Katz School of Medicine at Temple University Temple, Philadelphia, Pennsylvania 19140, USA

Correspondence to Ajay D. Rao, MD, Section of Endocrinology, Diabetes and Metabolism, Lewis Katz School of Medicine at Temple University, 3322 N Broad Street, Suite 205, Philadelphia, PA 19140, USA. Tel: +215 707 4600; fax: 215 707 5599; e-mail: [email protected]