_________________, sometimes called masking, occurs when participants in an experimental study and perhaps some research team members do not know whether a participant is in the active intervention group or the control group.
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Q41: _ examines a broad spectrum of biological,
Q42: One of the common approaches used to
Q43: A_ describes a group of individuals with
Q44: _ are essential for any outbreak investigation,
Q45: When the exposure histories for a pair
Q47: Correlational studies that explore an environmental exposure,
Q48: The incorrect attribution of population-level associations to
Q49: The _ is a well-defined subset of
Q50: _ is the measurement of the human
Q51: The websites of disease advocacy organizations, personal
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