Li, K., Yuan, L., Zhang, J., Li, W., Zhao, G., Chen, Z., Yang, Y., He, Z., Xiao, P. (2026). Periplaneta americana extract ameliorates recurrent oral ulcers in rats by enhancing the intestinal epithelial barrier and regulating gut microbiota. PLoS ONE. https://doi.org/10.1371/journal.pone.0340453