AU - Grady D, Berkowitz SA TI - WHy is a good clinical prediction rule so hard to find? PT - JOUR DP - 2011 TA - Archives of Internal Medicine pages = {1701-1702}, VI - 171 IP - 19 AID - 10.1001/archinternmed.2011.482 [doi] 4100 - http://dx.doi.org/10.1001/archinternmed.2011.482 SO - Archives of Internal Medicine October 24, 2011 171(19):1701