Question: Hello, Could you please help me with the following question: Summarize the strengths and weaknesses of the following various types of observational study designs: ecologic,

Hello,

Could you please help me with the following question:

Summarize the strengths and weaknesses of the following various types of observational study designs: ecologic, cross-sectional, case-control, and cohort.

Thank you for your help!

(: Frances

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