Expression of concern: The design and synthesis of redox-responsive oridonin polymeric prodrug micelle formulation for effective gastric cancer therapy.

Luzhou Xu, Lei Zhu, Kai Zheng, Junlou Liu, Panpan Tian, Di Hu, Qianqian Wang, Qiaoyun Zuo, Xiaosong Ouyang, Yanna Dai, Yuxian Fu, Xinyi Dai, Fang Huang, Jun Cheng