Supplemental material, Supplemental Material for Pancreas-specific plasma amylase for assessment and diagnosis of chronic pancreatitis: New insights on an old topic by Søren Schou Olesen, Henrik Krarup, Jakob Lykke Poulsen, Jeppe Hagstrup Christensen, Andrea Rhiannon Glynne Sheel, Robert Sutton, William Greenhalf, Christopher Halloran and Asbjørn Mohr Drewes in United European Gastroenterology Journal