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Users' guides to medical literatureMichael F Drummond; Scott Richardson; Bernie J O'Brien; Mitchell Levine; et alJAMA; May 21, 1997; 277, 19; Research Librarypg. 1552

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

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