Definition
Non-indexed literature and the systematic problem of information that exists but cannot be retrieved.
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- A systematic review of methods for studying consumer health YouTube videos, with implications for systematic reviews
- Checking reference lists to find additional studies for systematic reviews.
- Randomized controlled trials in pediatric complementary and alternative medicine: Where can they be found?
- Searching for controlled trials of complementary and alternative medicine: A comparison of 15 databases
- Should systematic reviewers search for randomized, controlled trials published as letters?
Elsewhere
WikidataHW-CON-020
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