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Does physical therapy help prevent recurrence of knee injuries? Thirty soccer players with a knee injury are assigned to attend physical therapy 3 times per
Does physical therapy help prevent recurrence of knee injuries? Thirty soccer players with a knee injury are assigned to attend physical therapy 3 times per week for a month. Thirty different soccer players with similar knee injuries are assigned to rest for a month. The players will be followed for a year and any subsequent knee injuries will be recorded. Is this an observational study or an experiment? Explain your reasoning.
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