In PubMed, however, along with these keywords, the following strategy was developed and used to search relevant literature in PubMed’s MeSH database: ((((“Procalcitonin/chemistry”[Mesh]) OR (“C-Reactive Protein/blood”[Mesh])) AND (“Systemic Inflammatory Response Syndrome”[Mesh])) OR (“Sepsis”[Mesh])) AND (“Postoperative Period”[Mesh]). Here, CRP is linked to systemic inflammatory response syndrome.