1 Department of Digestive and Oncological Surgery, Hôpital d'Instruction des Armées Sainte-Anne, Toulon, France.
2 Department of Digestive and Oncological Surgery, Hôpital d'Instruction des Armées Sainte-Anne, Toulon, France; École du Val-de-Grâce, Paris, France.
3 Department of Digestive and Oncological Surgery, Hôpital d'Instruction des Armées Sainte-Anne, Toulon, France. Electronic address: stephane_bourgouin@hotmail.fr.