Step-up approach for the treatment of infected necrotising pancreatitis: real life data from a single-centre experience with long-term follow-up oleh Claire Valentin, Guillaume Le Cosquer, Géraud Tuyeras, Adrian Culetto, Karl Barange, Pierre-Emmanuel Hervieu, Nicolas Carrère, Fabrice Muscari, Fatima Mokrane, Philippe Otal, Barbara Bournet, Bertrand Suc, Louis Buscail