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| − | =Evidence Based Anesthesia=
 | + | =Lidocaine pretreatment to decrease burning sensation of propofol= | 
| − | ==Lidocaine pretreatment to decrease burning sensation of propofol==
 | + | =LMA is a protected airway= | 
| − | ==LMA is a protected airway==
 | + | =Sevoflurane is better for the environment than isoflurane= |