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Homelessness is a global challenge.

The United Nations Human Settlements Program estimates that 1.1 billion people live in inadequate housing, and the best data available suggest that more than 100 million people have no housing at all.

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Smoking and common mental disorders: A population-based survey in Santiago, Chile
Smoking and common mental disorders (CMD), anxiety and depression, tend to co-exist and are important public health challenges for countries at all levels of development. The two largest U.S. psychiatric surveys detected clear associations between smoking and psychiatric disorders. In the Epidemiologic Catchment Area study (ECA) major depression was more common among smokers (6.6%) than non-smokers (2.9%). In the National Co-...