Tuure Saarinen1,2, Anne Juuti3. 1. Department of Abdominal Surgery, Helsinki University Hospital, Haartmaninkatu 4, FI-00029, Helsinki, Finland. tuure.saarinen@hus.fi. 2. University of Helsinki, Yliopistonkatu 4, FI-00100, Helsinki, Finland. tuure.saarinen@hus.fi. 3. Department of Abdominal Surgery, Helsinki University Hospital, Haartmaninkatu 4, FI-00029, Helsinki, Finland.