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In adolescent girls,increased levels of estrogen are linked to
Laboratory Observation
A research method where subjects are observed in a controlled environment to ensure accuracy of findings.
Control
The power or authority to direct, manage, or govern actions or outcomes.
Questionnaire
A structured series of questions used to gather information from respondents for research purposes.
Written Interview
A method of gathering information or assessing qualifications where questions are sent in written form for the respondent to answer also in writing.
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