[1] Hosp Univ Doce Octubre, Dept Med Oncol, Ave Cordoba Km 5-4, ES-28041 Madrid, Spain
[2] Haukeland Hosp, Dept Oncol, N-5021 Bergen, Norway
[3] Inst Gustave Roussy, Villejuif, France
[4] Hop Univ Paris Nord Val Seine, Oncol Med, Paris, France
[5] Charite, Dept Hepatol & Gastroenterol, Campus Virchow Klinikum, D-13353 Berlin, Germany
[6] Med Univ Vienna, Dept Surg, Vienna, Austria
[7] First Fac Med, Dept Oncol, Prague, Czech Republic
[8] Gen Teaching Hosp, Prague, Czech Republic
[9] Royal Free Hosp, Neuroendocrine Tumour Unit, Pond St, London NW3 2QG, England
[10] St Vincenz Hosp, Inst Pathol & Zytol, Limburg, Germany
[11] Univ Warmia & Mazury, Dept Radiol, Fac Med Sci, Olsztyn, Poland
[12] Royal Free Hosp, Neuroendocrine Tumour Unit, Pond St, London NW3 2QG, England
[13] St Vincents Univ, NET Ctr, Dublin, Ireland
[14] St James Hosp, Dept Clin Med, Dublin 8, Ireland
[15] Univ Dublin Trinity Coll, Dublin 2, Ireland
[16] Univ Bern, Inst Pathol, Bern, Switzerland