1. INSERM U 255, Paris, 75006 France; Université Paris-Descartes Paris 5, Faculté de Médecine, Paris, 75006 France; and Université Pierre et Marie Curie Paris 6, Institut des Cordeliers, Paris, 75006 France.
2. Institute for Genomics and Bioinformatics, Graz University of Technology, Graz, Austria.
3. Department of Pathology, Avicenne Hospital, Bobigny, 93017 France.
4. Department of Digestive Surgery, Avicenne Hospital, Bobigny, 93017 France.
5. Department of General and Digestive Surgery, Georges Pompidou European Hospital, AP-HP, Paris, 75015 France.