title: Letter to the editors--ventilation-perfusion studies for pulmonary embolism: a rebuttal to Dr. Eugene Robin.
mesh_terms: D005069:Evaluation Studies as Topic; D005189:False Positive Reactions; D006801:Humans; D008168:Lung / Q000098:blood supply / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011859:Radiography; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio; D014980:Xenon Radioisotopes
chemical_list: D014980:Xenon Radioisotopes