Zhang, X.; Wu, Z.; Shen, Q.; Li, R.; Jiang, X.; Wu, J.; Li, D.; Wang, D.; Zou, C.; Zhong, Y.; Cheng, X. Clinical Significance of Cell-Free DNA Concentration and Integrity in Serum of Gastric Cancer Patients before and After Surgery. Cell Mol Biol (Noisy-le-grand) 2019, 65, 111-117.