title: Known Unknowns.
authors.affiliation: Division of Pulmonary, Allergy, Critical Care, and Sleep Emory Center for Critical Care, Emory University, Atlanta, Georgia.
authors.forename: Jonathan E
authors.initials: JE
authors.lastname: Sevransky
mesh_terms: D003422:Critical Care / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D016032:Randomized Controlled Trials as Topic / Q000379:methods* / Q000401:mortality*