Carboxymethyl chitosan and poly-γ-glutamic acid-based gastroretentive sponge with high swelling and mechanical stability for targeted eradication of Helicobacter pylori - Xinyuan Zhang; Pei Xie; Yongkang Lai; Jiulong Zhao; Qiuping Gu; Yingfeng Wei; Zheng Chen; Liang Zhang; Shige Wang; Hongxin Sun; Chunping Zhu (Carbohydrate Polymers, 2025)