THE EFFECTIVENESS OF GROUP-BASED PSYCHOEDUCATION IN REDUCING STRESS LEVELS IN PEOPLE WITH DIABETES MELLITUS TYPE 2 : A SYSTEMATIC REVIEW. Nursing Sciences Journal, [S. l.], v. 10, n. 1, p. 91–104, 2026. DOI: 10.30737/nsj.v10i1.7423. Disponível em: https://ojs.unik-kediri.ac.id/index.php/nsj/article/view/7423. Acesso em: 4 may. 2026.