Article ID Journal Published Year Pages File Type
10514162 Journal of Clinical Epidemiology 2011 6 Pages PDF
Abstract
Sealed envelopes with some form of enhancement (opaque, sequentially numbered, and so forth) may give adequate concealment. Description of a study as "double blind" does not imply a lack of bias when concealment of allocation is unclear.
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Health Sciences Medicine and Dentistry Public Health and Health Policy
Preview
Different methods of allocation to groups in randomized trials are associated with different levels of bias. A meta-epidemiological study
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