TY - JOUR T1 - Clinical prediction rules JF - BMJ Y1 - 2009 A1 - Falk, G A1 - Fahey, T KW - Diagnosis KW - Diagnostic Errors KW - Family Practice KW - Humans KW - Likelihood Functions KW - Predictive Value of Tests KW - Questionnaires KW - Unnecessary Procedures VL - 339 UR - http://www.ncbi.nlm.nih.gov/pubmed/19666679 ER -