J. Hu, H. HUang, X. Chen, Y. Shao, and Y. Yu, “Clinical risk factors of carbohydrate antigen-125, cytokeratin fragment 19, and neuron-specific enolase in liver metastases from elderly lung cancer patients Running title: Risk Factors of Liver Metastasis from Lung Cancer”, Am J Transl Med, vol. 7, no. 4, pp. 372–381, Dec. 2023.