Cao, Yang, et al. “Diagnostic Value of Serum Fibroblast Growth Factor 21 Combined With Fibrosis-4 Index for Hepatic Fibrosis in Metabolic Dysfunction–Associated Steatotic Liver Disease”. Turkish Journal of Gastroenterology, vol. 37, no. 7, June 2026, pp. 782-9, doi:10.5152/tjg.2026.25740.