title: Pulmonary embolism and normal oxygenation: application of PIOPED-derived likelihood ratios.
authors.forename: E W
authors.initials: EW
authors.lastname: Ely
authors.forename: J M
authors.initials: JM
authors.lastname: Smith
authors.forename: E F
authors.initials: EF
authors.lastname: Haponik
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000503:physiopathology*; D012306:Risk; D014692:Ventilation-Perfusion Ratio