1. Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University; Department of Surgery, County Council of Östergötland, 58185 Linköping, Sweden
2. CNR c/o Dipartimento di Biologia e Patologia Cellulare e Molecolare, Istituto di Oncologia Sperimentale “G. Salvatore”, Università Federico II, 80131 Napoli, Italy
3. Universitätsklinik und Poliklinik für Allgemein-, Viszeral- und Gefäßchirurgie, Martin-Luther Universität, 06097 Halle, Germany
4. Endocrine Oncology Section, Surgery Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA