2.8. Animals
Female BALB/c mice aged six to eight weeks were maintained in the pathogen-free conditions. All procedures of the animal experiments were approved by the Animal Ethical Experimentation Committee of Institute of Process Engineering, Chinese Academy of Sciences (Beijing, China, Permission no. SYXK2019-0004), according to the requirements of the National Act on the Use of Experimental Animals (China). The manuscript does not contain human studies.