Animal bioassay experiments

Name	Type	Comments
subchronic rat	Subchronic (30-90 days)	The selected rats were randomly divided into four groups (control group, fluoride exposure group, selenium antagonist group, and selenium exposure group) with equal size based on body weight. A total of thirty-two clean SD rats at three-week old, equal male and female, were purchased from Research Institute of Surgery of Third Military Medical University (a.k.a. Daping hospital, No. 0052958 License: SCXK-(military) 2007-017) for the study.