The phrase "to use a mouse" means using a small device that you move around on a flat surface to control and move things on a computer screen. Full definition
The researchers also conducted experiments using a mouse model of leukemia. (sciencedaily.com)
An important caution regarding this paper is that the researchers used mice with a DNA repair deficiency in order to assemble their data. (fightaging.org)
A small study using mice as subjects found some evidence that coconut oil was effective in repairing cells and increasing antioxidants following the experience of stress. (verywellhealth.com)