METHODS	Patients were randomized to receive either 2 mg/kg propofol , 1.5 mg/kg methohexital , 5 mg/kg thiopental , 0.3 mg/kg etomidate , 2 micrograms/kg fentanyl and 0.15 mg/kg midazolam , or 1.5 mg/kg ketamine and 0.15 mg/kg midazolam intravenously .\