BACKGROUND : In this retrospective comparative study , we aimed to compare the effectiveness of fentanyl , midazolam , and a combination of fentanyl and midazolam to prevent etomidate-induced myoclonus .
O O O O O O O O O O O O O O O B-ChemicalEntity O B-ChemicalEntity O O O O O B-ChemicalEntity O B-ChemicalEntity O O B-ChemicalEntity B-DiseaseOrPhenotypicFeature O