Triglyceride-glucose-based indices in relation to vitamin D concentrations among adults with metabolic syndrome - Raju Rana; Purnima Adhikari; Ullas Kamath; B. Ananthakrishna Shastri; Shashikiran Umakanth; G. Arun Maiya; Raghavendra Rao S; Vani Lakshmi R; Shobha U. Kamath (PLoS ONE, 2026)