TTR and nutritional deficiency disease: After centrifugation, blood plasma will be collected and stored at −80 °C until processing via an enzyme-linked immunosorbent assay (ELISA) to analyze inflammatory markers (IL-1β, IL-6, TNF-α, CRP), malnutrition biomarkers (transthyretin and retinol binding protein), as well as metabolic hormones (e.g., leptin, adiponectin, ghrelin, and thyroid hormones) held by our laboratory.