Serum calprotectin as a biomarker for postoperative complications in colorectal surgery: a pilot study defining normal postoperative dynamics

This study is prospectively registered in DRKS-ID (Deutsches Register Klinischer Studien, German WHO Register): DRKS00027142, data of registration 29.11.2021. This is a WHO-recognized primary registry that meets the requirements of the International Committee of Medical Journal Editors (ICMJE). We registered this study in the DKG (Deutsche Krebsgesellschaft) Sudybox ST-D512, data of registration 11.03.2022.