"Calcium signaling" . "Serum calcium as a biomarker of clinical severity and prognosis in patients with coronavirus disease 2019" . "Calcium" . "Zoonoses" . "COVID-19" . "Biology terminology" . "Biological techniques and tools" . . "Biology and pharmacology of chemical elements" . "Biomarkers" . "Viral respiratory tract infections" . "Medical terminology" . "Signal transduction" . "Occupational safety and health" .