[1] Univ Copenhagen, Hvidovre Hosp, Dept Surg Gastroenterol, DK-2650 Hvidovre, Denmark
[2] Univ Copenhagen, Inst Surg & Anaesthesiol, DK-2650 Hvidovre, Denmark
[3] Danish Canc Soc, Copenhagen, Denmark
[4] Univ Copenhagen, Dept Vet Dis Biol, Fac Life Sci, Frederiksberg, Denmark
[5] Bispebjerg Hosp, Copenhagen, Denmark
[6] Glostrup Univ Hosp, Glostrup, Denmark
[7] Odense Univ Hosp, DK-5000 Odense, Denmark
[8] Randers Cty Hosp, Randers, Denmark
[9] Aarhus Univ Hosp, DK-8000 Aarhus, Denmark
[10] Univ Munich, Dept Clin Chem, Grosshardern, Germany
[11] Vrije Univ Amsterdam Med Ctr, Dept Clin Chem, Amsterdam, Netherlands
[12] Abbott Canc Diagnost Res, Chicago, IL USA
[13] Rigshosp, Finsen Lab, Copenhagen Bioctr, DK-2100 Copenhagen, Denmark