AL-ATHOOBY, Mubarak et al. Assessment of Drug-Related Problems, Medication Adherence and Polypharmacy Among Elderly Outpatients in Sana’a City, Yemen. Institutional Repository for Scientific Scholarship at 21 September University for Medical and Applied Sciences, اليمن، صنعاء, v. 7, n. 2, p. 1–67, 2026. DOI: 10.65693/irss.2026.v7i2.344. Disponível em: https://ojs.21umas.edu.ye/irss/article/view/344. Acesso em: 30 oct. 2026.