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Use "unblinding" in a sentence
"But if your study subjects are on the same social-networking group, what's to stop people from swapping enough information to figure out which of them is on the real medication vs. the placebo, essentially "unblinding" the study? ""
"Staff could be seen to enter rooms where placebo and real drugs were mixed, unblinding and invalidating entire studies sent to the FDA as data for new drug applications."
"John Lauritsen, an independent scholar, in "Poison by Prescription: The AZT Story," chronicles how scientific principles were compromised by the unblinding of the clinical trials of AZT."