Effect of Ethanol Extract of Chayote (Sechiumedule.Jacq.Swartz) on the Activity of Glutathione Peroxide (GPx) in House Mice (Musmusculus L) Strain DD Webster Hyperglycemia Induced by Streptozotocin (STZ) (Masters Program in Public Health, Universitas Sebelas Maret, Indonesia, 2016)