title: Questions with inconclusive answers.
authors.forename: S
authors.initials: S
authors.lastname: Ewig
mesh_terms: D019072:Antibiotic Prophylaxis; D001999:Bronchoscopy / Q000009:adverse effects* / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D011015:Pneumonia, Aspiration / Q000382:microbiology / Q000517:prevention & control*; D011322:Primary Prevention / Q000379:methods; D012121:Respiration, Artificial / Q000009:adverse effects* / Q000379:methods; D018570:Risk Assessment; D012680:Sensitivity and Specificity