METHODS	The patients received only midazolam ( 0.02 mg kg-1 ) , or midazolam ( 0.02 mg kg-1 ) + propofol ( 0.2 mg kg-1 ) , or midazolam ( 0.02 mg kg-1 ) + fentanyl ( 1 microgram kg-1 ) , or midazolam ( 0.02 mg kg-1 ) + propofol ( 0.2 mg kg-1 ) + fentanyl ( 1 microgram kg-1 ) .\