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LDB is an editorial reference library. For corrections, source queries, or to flag a broken or outdated link, the editorial inbox is the best route.

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Email [email protected]. Useful messages include: a correction to a quotation or its attribution; a public-health resource that has moved or gone offline; a current, authoritative source that belongs in one of the topic or country guides; or a question about how a page is sourced.

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Last reviewed April 9, 2026.