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Comment on the following sampling methods used in the following investigation, Correct or Not correct, and WHY To study the association between diet and gastroenteritis,

Comment on the following sampling methods used in the following investigation, Correct or Not correct, and WHY To study the association between diet and gastroenteritis, the dietary histories of infants all admitted to a hospital for gastroenteritis were compared with those of a random sample of infants attending nearby infant welfare clinic

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