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The capital of the Umayyad caliphate was in
Case-control Study
A type of observational study where two groups are compared: those with the disease or outcome of interest (cases) and those without the disease (controls), to identify factors that may contribute to the disease's presence.
Case-series
A descriptive study type that tracks subjects with a known exposure or treatments to document outcomes.
Cross-sectional Survey
A variety of observational research that evaluates information gathered from a whole population or a proportional segment, during a singular time frame.
Serostatus
The presence or absence of specific antibodies or antigens in the blood, indicating whether an individual has been exposed to a particular pathogen or not.
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