Hoeltzenbein, 2018
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prospective cohort
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Prospective observational cohort study, i.e., the outcome of the evaluated pregnancies was not known at the time of case enrollment. => Exposure collected at the time of enrollment when health care professionals and patients called the service.
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Outcome of pregnancy is collected via mailed questionnaires about 8 weeks after the estimated date of birth. Additional medical records are requested in cases of anomalies or implausible information
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No adjustment for this group of exposure. Matched by year of enrollment. Exclusion of pregnancies exposed to established teratogens.
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