Assessing Non-Invasive Liver Function in Patients with Intestinal Failure Receiving Total Parenteral Nutrition—Results from the Prospective PNLiver Trial oleh Elisabeth Blüthner, Ulrich-Frank Pape, Martin Stockmann, Mirjam Karber, Sebastian Maasberg, Sophie Pevny, Undine Gerlach-Runge, Andreas Pascher, Johann Pratschke, Frank Tacke, Jan Bednarsch