Corresponding Author

Soo Lim MD

Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea

Correspondence

Soo Lim, MD, PhD Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea Tel: +82-31-787-7035, Fax: +82-31-787-4051, Email: limsoo@snu.ac.kror Ele Ferrannini, MD, PhD CNR Institute of Clinical Physiology, Pisa, Italy Tel: +39-050-553272,

Email: ferranni@ifc.cnr.it