tabac (1) étable (1) société (humaine) (1) région (1) besoin (1) santé (1) exposition (1) alcool (1) taux (1) Context (1) Prevention (1) Alcohol use (1) Methods (1) Shelters for the homeless (1) Origin (1) Waves (1) Tobacco use (1) Tobacco (1) Substance abuse (1) Spring (1) Science (1) Population (1) Persons (1) Mental health (1) Medical care (1) Manufacturers' agents (1) Human beings (1) Homelessness (1) Homeless persons (1) Health (1)