1 Service de chirurgie digestive, hôpital Estaing, Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand Cedex, France. Electronic address: [email protected].
2 Service de chirurgie digestive, hôpital Estaing, Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand Cedex, France.