1. Serum Procalcitonin as a Predictive Biomarker in COVID-19: A Retrospective Cohort Analysis
   Aaiz Hussain et al, 2022, Cureus CrossRef
2. Elevation of serum procalcitonin (sPCT) in a non-infected patient: diabetes mellitus as a neglected cause of high sPCT values
   Chiara Robino et al, 2020, Minerva Anestesiologica CrossRef