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Identify the following as an experiment or observational study Researchers wanted to learn more about...

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Identify the following as an experiment or observational study Researchers wanted to learn more about the therapeutic effects of paeoniflorin PF on irritable bowel syndrome in rats They randomly divided sixty male Sprague Dawley rats into either no drug low dose PF or high dose groups After 2 consecutive weeks the effect of PF on abdominal pain symptoms was assessed based on the abdominal withdrawal reflex score fecal water content and pathological changes in colon tissues Observational Study Experiment

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