[1] Univ Med Ctr Utrecht, Dept Endocrine Surg Oncol, Utrecht, Netherlands
[2] CHU Dijon, Dept Digest & Endocrine Surg, French Endocrine Tumor Study Grp GTE, Dijon, France
[3] Philipps Univ Marburg, Dept Visceral Thorac & Vasc Surg, Baldingerstr, Marburg, Germany
[4] Univ Texas MD Anderson Canc Ctr, Dept Surg Oncol, Houston, TX 77030 USA
[5] Univ Florence, Dept Surg & Translat Med, Florence, Italy
[6] NCI, Endocrine Oncol Branch, NIH, Bethesda, MD 20892 USA
[7] Univ Lorraine, CHU Nancy, Dept Digest Hepatobiliary & Endocrine Surg, Hop Brabois Adultes, Nancy, France
[8] Univ Hlth Network, Dept Surg, Toronto, ON, Canada
[9] Northwestern Univ, Dept Surg, Chicago, IL 60611 USA
[10] Univ Med Ctr Utrecht, Dept Surg Oncol & Endocrine Surg Oncol, Utrecht, Netherlands
[11] Univ Med Ctr Utrecht, Dept Endocrine Oncol, DutchMEN Study Grp DMSG, Utrecht, Netherlands