title: Conclusions need to be based on sound data:  keep an eye on both bias and imprecision.
authors.forename: Jochen
authors.initials: J
authors.lastname: Hinkelbein
authors.forename: Martin
authors.initials: M
authors.lastname: Hellmich
mesh_terms: D000768:Anesthesia, General / Q000295:instrumentation*; D000776:Anesthesiology / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male