aHarvard Medical School

bDepartment of Surgery, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA

cNorthwestern University Feinberg School of Medicine

dDepartment of Surgery, Northwestern Memorial Hospital, Chicago, Illinois, USA

Correspondence to Benjamin C. James, MD, MS, FACS, Chief, Section of Endocrine Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, 185 Pilgrim Road, Palmer 605, Boston, MA 02215, USA. Tel: +1 617 632 1020; fax: +1 617 632 1040; e-mail: [email protected]