G. K. Altarcha, A. A. Joy, and J. Iglesias, “Nonlinear Relationship Between Serum 25-Hydroxyvitamin D and Glycemic Control Among US Adults: A Survey-Weighted Analysis of NHANES 2017–2018”, J Endocrinol Metab, vol. 16, no. 4, pp. 167–171, Jan. 2026, doi: 10.14740/jem1658.