Serum TLR2, PGE2, and IL-6 in prediction of spontaneous preterm birth 
Yu Chunmei, Chai Tingting, Wang Qing
International Medicine and Health Guidance News . 2022, (19): 2769 -2772 .  DOI: 10.3760/cma.j.issn.1007-1245.2022.19.023