Gutiérrez-Cáceres S, Serrano-Gallardo P, Pedráz-Marcos A. Older adult in methadone treatment: socio-economic status and chronicity. HAAJ [Internet]. 2023Jan.28 [cited 2024Jul.3];23(1):183-202. Available from: https://ojs.haaj.org/?journal=haaj&page=article&op=view&path[]=726