[1] Univ Vita & Salute, Hosp San Raffaele, Dept Surg, Milan, Italy
[2] Univ Uppsala Hosp, Dept Endocrine Oncol, Uppsala, Sweden
[3] Natl Univ Athens, Div Endocrinol, Dept Pathophysiol, Athens, Greece
[4] Univ Marburg, Dept Surg, Marburg, Germany
[5] Vall dHebron Univ Hosp, Inst Oncol VHIO, Barcelona, Spain
[6] Royal Free Hosp, Neuroendocrine Tumour Unit, Pond St, London NW3 2QG, England
[7] Med Univ Silesia, Dept Endocrinol, Katowice, Poland
[8] Erasmus MC, Div Nucl Med, Dept Internal Med, Rotterdam, Netherlands
[9] Univ Cattolica Sacro Cuore, Policlin A Gemelli, Inst Pathol Anat, Rome, Italy
[10] Tech Univ Munich, Inst Pathol, D-80290 Munich, Germany
[11] Gartnavel Royal Hosp, Beatson Oncol Ctr, Glasgow, Lanark, Scotland
[12] CHU Robert Debre, Dept Surg, Reims, France
[13] NIH, Digest Dis Branch, Bldg 10, Bethesda, MD 20892 USA