Serum concentrations of proinflammatory biomarker interleukin-6 (IL-6) as a predictor of postoperative complications after elective colorectal surgery.

"Declarations Ethics approval and consent to participateThis study was approved by the Medical Ethical Committee of the Faculty Hospital Brno (no. 10–270420/EK) in accordance with the ethical principles of the Declaration of Helsinki. It was reviewed by the Medical Ethical Committee of the Faculty Hospital Brno (no. 10–270420/EK), and the approved text was signed by every involved participant. The authors obtained consent from all participants for their participation in this research project, and the authors maintain a record of their consent. Consent to publicationThe authors publish no identifiable data. The authors obtained consent (approved as above) from all participants for publication of their anonymized data and results of this research project, and the authors maintain a record of their consent. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This work was funded by Operational Programme Research, Development, and Education within the project National Institute for Cancer Research (Programme EXCELES, ID Project No. LX22NPO5102) — funded by the European Union — Next-Generation EU and by Charles University project Cooperatio ONCO and supported by the Ministry of Health, Czech Republic — conceptual development of research organization (FNBr, 65269705)."