title: Problems with PERC.
authors.forename: David T
authors.initials: DT
authors.lastname: Schwartz
mesh_terms: D003661:Decision Support Techniques; D003937:Diagnosis, Differential; D003951:Diagnostic Errors / Q000517:prevention & control; D006801:Humans; D011655:Pulmonary Embolism / Q000175:diagnosis*