Substance-Related Disorders/*complications/epidemiology
        Landi, F., Gambassi, G., Lapane, K. L., Sgadari, A., Gifford, D., Mor, V., Bernabei, R. 1998. Comorbidity and drug use in cognitively impaired elderly living in long-term care. Dement Geriatr Cogn Disord.  9 (6) 347-56.